Feuling HP+ Conversion: Mastering the 2001-2006 Twin Cam Valvetrain Standard

The Feuling HP+ Hydraulic Cam Chain Tensioner Conversion Kit for Harley-Davidson Twin Cam (2001-2006) represents the pinnacle of streamlined engine architecture for the serious performance enthusiast. For the rider of an early-model Fat Boy, Dyna Super Glide, or Electra Glide who values the precision of a competition-grade “Hydraulic Conversion” signature as much as long-term structural durability, the challenge has always been finding a timing system that bridges the gap between raw, performance-oriented oiling and elite factory-integrated reliability. The Feuling system addresses these concerns by providing a rigid, precision-engineered foundation, designed to maximize cam bearing life and oil pressure stability. This design provides secure, mechanical utility by utilizing a refined, billet-integrated geometry, effectively providing a high-output structural delivery that prevents tensioner wear and optimizes balance during high-velocity urban runs and aggressive highway sprints. This provides the mechanical synchronization of timing management and elite motorcycle management needed to keep the rider confident, maximizing the efficiency of your performance run.

Material Innovation and Industrial Precision

What sets the Feuling HP+ assembly apart in the marketplace is the uncompromising focus on structural stability and metallurgical durability. In the high-performance Twin Cam scene, valvetrain integrity is paramount; however, this system features a robust, precision-machined assembly that ensures the cam chains remain synchronized perfectly without compromising the integrity of the critical oiling circuits over years of heavy-duty use. The high-quality billet finish is engineered for secure, long-lasting aesthetic appeal, providing a high-output, uniform finish that resists thermal expansion and harsh environment wear. Every unit is manufactured to exacting tolerances in the USA, featuring specialized high-flow internal passages for secure, vibration-free operation on all compatible 2001-2006 models. Whether you are navigating technical city streets or cruising through mountain passes, Feuling ensures your engine remains synchronized by professional-grade engineering integrity.

Expert Fitment & Performance Advice

As specialists in motorcycle engine ergonomics, we recommend the Feuling HP+ Conversion Kit for any build where “unmatched timing reliability” and “professional-grade engine capability” are the mission priorities. Pro Tip: To achieve your perfect setup, always check your crankshaft run-out before installation to ensure the secure mechanical balance of your oil pump alignment; this is vital for maintaining a confident, high-power output. Installation Note: This kit is specifically calibrated for the conversion of spring-style to hydraulic timing requirements for total chassis synchronization of your high-output machine. Maintenance Note: Regularly inspect your oil filters for debris to maintain the high-output mechanical integrity of the new hydraulic circuits. Performance Note: Always verify that your cam plate bolts are torqued to a secure, mechanical specification to ensure the system performs as designed during a high-speed touring scenario.

The Professional Standard for Premium Valvetrain Integrity

Choosing the Feuling HP+ Hydraulic Cam Chain Tensioner Conversion Kit means investing in unmatched mechanical stability and a refined engineering signature. It offers a unique combination of modern material science and bold design that honors the performance legacy of the Feuling brand. For the rider who wants a high-output presence and a flawless engineering finish, Feuling is the unmatched leader. Secure the ride, master the road, and ride with confidence.

Feuling HP+ 525 Conversion: Mastering the Twin Cam Valvetrain Standard

The Feuling HP+ 525 Hydraulic Conversion Camchest Kit for Harley-Davidson Twin Cam (1999-2006) represents the pinnacle of streamlined engine architecture for the serious performance enthusiast. For the rider of an early 88″ or 95″ Twin Cam who values the precision of a competition-grade “Hydraulic” signature as much as long-term structural durability, the challenge has always been finding a kit that bridges the gap between raw, performance-oriented torque and elite factory-integrated reliability. The HP+ 525 system addresses these concerns by providing a comprehensive, precision-engineered foundation, designed to maximize oiling efficiency and valvetrain stability. This design provides secure, mechanical utility by utilizing refined, bolt-in cam geometry, effectively providing a high-output power delivery that prevents tensioner failure and optimizes engine cooling during high-velocity urban runs and aggressive highway sprints. This provides the mechanical synchronization of valve timing and elite internal lubrication management needed to keep the rider confident, maximizing the efficiency of your performance run.

Material Innovation and Industrial Precision

What sets the Feuling HP+ 525 kit apart in the marketplace is the uncompromising focus on structural stability and component durability. In the early Twin Cam scene, camchest integrity is paramount; however, this system features a robust, precision-machined billet aluminum oil pump and camplate assembly that ensures the valvetrain remains synchronized perfectly without compromising the integrity of the critical engine cases over years of heavy-duty use. The internal components are engineered for secure, long-lasting aesthetic appeal and mechanical smoothness, providing a high-output, uniform surface that resists wear and harsh environment stress. Every unit is manufactured to exacting tolerances, featuring precision-machined oil passages for secure, leak-free installation on all Twin Cam models from 1999 through 2006. Whether you are navigating technical city streets or cruising through mountain passes, Feuling ensures your engine remains synchronized by professional-grade engineering integrity.

Expert Fitment & Performance Advice

As specialists in motorcycle engine ergonomics, we recommend the Feuling HP+ 525 kit for any build where “unmatched reliability” and “professional-grade touring capability” are the mission priorities. Pro Tip: To achieve your perfect setup, utilize high-quality adjustable pushrods to ensure precise valvetrain clearance; the secure mechanical balance is vital for maintaining a confident, high-power output during touring sessions. Installation Note: This kit is specifically designed to accommodate early-style cam bearings for total engine synchronization of your high-output powerplant. Maintenance Note: Regularly inspect your oil filter to maintain the high-output mechanical integrity and protect the engine from internal debris. Performance Note: Always verify that all camplate bolts are torqued to a secure, mechanical specification to ensure the system performs as designed during a high-speed touring scenario.

The Professional Standard for Premium Engine Integrity

Choosing the Feuling HP+ 525 Hydraulic Conversion Kit means investing in unmatched mechanical stability and a refined engineering signature. It offers a unique combination of modern metallurgical science and bold design that honors the performance legacy of the Feuling brand. For the rider who wants a high-output presence and a flawless engineering finish, Feuling is the unmatched leader. Secure the ride, master the road, and ride with confidence.

Feuling HP+ 543 Kit: Mastering Late-Model Twin Cam Performance for 2026

The Feuling HP+ 543 Camchest Kit for 2006-2017 Harley-Davidson Twin Cam models represents the 2026 pinnacle of drivetrain and lubrication architecture. While the later Twin Cam engines featured improved hydraulic tensioners, they still suffer from inconsistent oil pressure and “sumping” during aggressive 2026 riding. Feuling addresses these 2026 concerns by replacing the entire camchest with industrial-grade components. The 543 Reaper Cams are specifically ground to provide secure, mechanical utility where modern riders need it most: the low-to-mid RPM range. This ensures your 96″, 103″, or 110″ engine pulls hard through 2026 traffic and highway passing zones, providing the mechanical synchronization of valve timing and oil pressure needed to unlock the true potential of your Big Twin.

High-Volume Lubrication and Precision Engineering

What sets the Feuling HP+ kit apart in the 2026 marketplace is the inclusion of the HP+ High Volume Oil Pump and Billet Camplate. In the high-performance 2026 scene, heat management is the key to engine life. This pump increases oil pressure by 40% and return volume by 60% over stock, effectively “washing” the engine in cooling oil and preventing the 2026 “sumping” issues that can lead to power loss and engine wear. The camplate is machined from 7075 billet aluminum, which is significantly more rigid than the factory cast plate. This ensures the industrial-strength 2026 stability required to keep the camshafts perfectly aligned under high-load situations. This results in a high-output 2026 presence that you can hear and feel through reduced mechanical noise and a crisper, more secure engine idle.

Expert Installation & Performance Advice

As specialists in V-Twin engine architecture, we recommend the 543 Camchest Kit for any 2026 build that requires a “bulletproof” foundation for touring or street-performance. Pro Tip: To maximize your 2026 performance, we highly recommend inspecting your **inner cam bearings** and using the included Timken bearings provided in this kit. Installation Note: For 2006-2017 models, ensure you use the Feuling assembly lube on all friction surfaces to prevent 2026 dry-start damage. Maintenance Note: Use a high-quality 20w50 full synthetic oil to maintain the 2026 integrity of the high-flow pump galleries. Safety Note: Because this kit significantly changes engine volumetric efficiency, a **fuel management recalibration** (such as a Dynojet Power Vision) is mandatory to prevent lean conditions and ensure a secure, powerful 2026 ride.

The Professional Standard for Twin Cam Reliability

Choosing the Feuling HP+ 543 Camchest Kit means investing in unmatched mechanical stability and a refined power signature. It offers a unique combination of modern metallurgical science and a robust design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling Parts is the unmatched leader. Secure the oiling, master the power, and ride the distance.

Feuling HP+ 543 Camchest Kit For Harley Twin Cam

Features:

• Bulletproof your engine with maximum reliability
• 25-35 degree cooler engine temperatures
• 15-30 degree cooler oil temperatures
• 15-30 more pounds of oil pressure
• More power
• Quieter and smoother engine operation
• Eliminate wet sumping, blow by and oily air cleaners

543 Cam Info:

543 cams, also known as The Freeway Flyer, a great camshaft for those who want more top end power than our 525 cam without sacrificing low end torque. Extremely smooth cam lobe layout maintains quiet valvetrain and produces the smoothest cruise power band available. Excellent bolt in camshaft for stock to mild 96 and 103 engines and works well in 88 & 95 engines. This cam is easy starting, increases throttle response and fuel mileage. Responds well to increased compression ratio, performance exhaust and a high flow air cleaner. Performance valve springs are required on 99-04 engines and performance pushrods and lifters are recommended but not required. RPM 1,900-6,000

• Intake open/close 15°/43°
• Exhaust open/close 56°/12°

• Intake duration 238°
• Exhaust duration 248°

• Intake Lift .543″
• Exhaust Lift .553″

Feuling HP+ 543 Kit: Mastering Twin Cam Oiling and Power for 2026

The Feuling HP+ 543 Camchest Kit for 1999-2006 Harley-Davidson Twin Cam models represents the 2026 pinnacle of drivetrain and lubrication architecture. For owners of early Twin Cam engines, the factory oiling system and chain tensioners are known weak points that can lead to catastrophic failure. Feuling addresses these 2026 concerns by replacing the entire “heart” of the engine with industrial-grade components. The 543 Reaper Cams are specifically ground to provide secure, mechanical utility where riders need it most: the low-to-mid RPM range. This ensures your 88″ or 95″ engine pulls hard through 2026 traffic and highway passing zones, providing the mechanical synchronization of valve timing and oil pressure needed to modernize the performance of your classic Big Twin.

High-Volume Lubrication and Precision Engineering

What sets the Feuling HP+ kit apart in the 2026 marketplace is the inclusion of the HP+ High Volume Oil Pump and Billet Camplate. In the high-performance 2026 scene, heat management is the key to longevity. This pump increases oil pressure by 40% and return volume by 60% over stock, effectively “washing” the engine in cooling oil and preventing the 2026 “sumping” issues that plague these engines. The camplate is machined from 7075 billet aluminum, which is significantly stronger than the factory cast plate. This ensures the industrial-strength 2026 stability required to keep the camshafts perfectly aligned under high-load situations. This results in a high-output 2026 presence that you can hear and feel through reduced mechanical noise and a crisper, more secure engine idle.

Expert Installation & Performance Advice

As specialists in V-Twin engine architecture, we recommend the 543 Camchest Kit for any 2026 build that requires a “bulletproof” foundation. Pro Tip: To maximize your 2026 performance, we highly recommend inspecting and replacing your **cam chain tensioner pads** with high-durability versions during this install. Installation Note: For 1999-2006 models, ensure you use the Feuling assembly lube on all friction surfaces to prevent 2026 dry-start damage. Maintenance Note: Use a high-quality 20w50 full synthetic oil to maintain the 2026 integrity of the high-flow pump galleries. Safety Note: Because this kit significantly changes engine volumetric efficiency, a **fuel management recalibration** (such as a Dynojet Power Vision) is mandatory to prevent lean conditions and ensure a secure, powerful 2026 ride.

The Professional Standard for Twin Cam Reliability

Choosing the Feuling HP+ 543 Camchest Kit means investing in unmatched mechanical stability and a refined power signature. It offers a unique combination of modern metallurgical science and a robust design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling Parts is the unmatched leader. Secure the oiling, master the power, and ride the distance.

Feuling HP+ 543 Camchest Kit For Harley Twin Cam

Features:

• Bulletproof your engine with maximum reliability
• 25-35 degree cooler engine temperatures
• 15-30 degree cooler oil temperatures
• 15-30 more pounds of oil pressure
• More power
• Quieter and smoother engine operation
• Eliminate wet sumping, blow by and oily air cleaners

543 Cam Info:

543 cams, also known as The Freeway Flyer, a great camshaft for those who want more top end power than our 525 cam without sacrificing low end torque. Extremely smooth cam lobe layout maintains quiet valvetrain and produces the smoothest cruise power band available. Excellent bolt in camshaft for stock to mild 96 and 103 engines and works well in 88 & 95 engines. This cam is easy starting, increases throttle response and fuel mileage. Responds well to increased compression ratio, performance exhaust and a high flow air cleaner. Performance valve springs are required on 99-04 engines and performance pushrods and lifters are recommended but not required. RPM 1,900-6,000

• Intake open/close 15°/43°
• Exhaust open/close 56°/12°

• Intake duration 238°
• Exhaust duration 248°

• Intake Lift .543″
• Exhaust Lift .553″

Feuling HP+ 525: Optimizing the 2006-2017 Twin Cam for 2026 Performance

The Feuling HP+ 525 Camchest Kit for 2006-2017 Harley-Davidson Twin Cam models represents the 2026 pinnacle of valvetrain and lubrication synchronization. For riders of the 96″, 103″, and 110″ engines, the goal is often to find that perfect balance between “stoplight-to-stoplight” torque and highway reliability. The 525 camshaft is a versatile “Reaper” series grind that provides a wicked increase in power from 1,750 to 5,500 RPM. Because it is designed to work within the limits of stock valve springs, it is the ultimate high-performance 2026 bolt-in solution for late-model Twin Cams. For the rider seeking secure, industrial-strength utility and an engine that stays cool under the most demanding 2026 conditions, the Feuling HP+ 525 kit is the definitive choice.

Superior Scavenging and Structural Rigidity

What sets the Feuling HP+ kit apart in the 2026 marketplace is the legendary Feuling High-Flow Oil Pump. In the high-output 2026 environment, oil management is the key to longevity. This pump increases oil pressure and scavenging volume significantly, which reduces “sumping” and lowers oil temperatures by up to 30 degrees. This increased flow ensures that your lifters stay pumped up and your top-end stays quiet during intense 2026 summer riding. The included HP+ Billet Cam Plate is machined from 7075 aluminum, which is significantly stronger than the stock cast plate, preventing the flex that leads to oil pressure loss and mechanical wear. This ensures the high-output 2026 presence and mechanical synchronization required to eliminate the “ticking” often heard in performance Twin Cams. This kit is a complete engineering upgrade that protects your investment while delivering massive torque gains.

Expert Installation & Performance Advice

As specialists in Twin Cam architecture, we recommend the 525 kit for heavy touring bikes that need extra “grunt” to pass in 2026. Pro Tip: To truly maximize the 2026 potential of the 525 cams, pair this kit with a high-flow air cleaner and a performance exhaust to allow the engine to breathe properly. Installation Note: We highly recommend upgrading to Full-Complement Timken Inner Cam Bearings during this 2026 installation to ensure total bottom-end security. Maintenance Note: Use a high-quality 20W-50 synthetic oil and change the filter after the first 500 miles of 2026 break-in to ensure the new cam surfaces seat perfectly. Safety Note: While this is a bolt-in cam, a fuel map recalibration via Dynojet Power Vision is mandatory to ensure your 2026 engine remains bulletproof and powerful.

The Professional Standard for Twin Cam Engine Integrity

Choosing the Feuling HP+ 525 Camchest Kit means investing in unmatched mechanical stability and a refined power signature. It offers a unique combination of modern metallurgical strength and a proven design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling is the unmatched leader. Power the ride, cool the heart, and ride the distance.

Features:

• Bulletproof your engine with maximum reliability
• 25-35 degree cooler engine temperatures
• 15-30 degree cooler oil temperatures
• 15-30 more pounds of oil pressure
• More power
• Quieter and smoother engine operation
• Eliminate wet sumping, blow by and oily air cleaners

525 Cam Info:

525 cams are a real workhorse, designed to increase torque band width and increase fuel economy. Great bolt in camshaft upgrade for stock 88 & 96 engines also performs very well in 103 strokers. Produces strong low and mid range power with a linear horsepower and torque curve. Can be used with factory valve springs, pushrods and lifters. Increases throttle response and eases starting. Will also respond well to increased compression and cylinder head work. RPM 1,750 – 5,500

• Intake open/close 4°/42°
• Exhaust open/close 51°/5°

• Intake duration 226°
• Exhaust duration 236°

• Intake Lift .525″
• Exhaust Lift .535″

Feuling HP+ 525: Solving the Twin Cam 88 Reliability Gap for 2026

The Feuling HP+ 525 Camchest Kit for 1999-2006 Harley-Davidson Twin Cam models represents the 2026 pinnacle of valvetrain and lubrication synchronization. For owners of the early 88ci platform, the factory oiling system and spring-loaded tensioners are well-known weak points. Feuling addresses these vulnerabilities by providing a total cam chest solution that not only adds power but significantly increases engine life. The 525 camshaft is a versatile “Reaper” series grind that provides a wicked increase in power from 1,750 to 5,500 RPM. Because it is designed to work with stock valve springs and pushrods, it is the ultimate high-performance 2026 bolt-in solution for 88″ and 95″ engines. For the rider seeking secure, industrial-strength utility and an engine that stays cool under the most demanding 2026 conditions, the Feuling HP+ 525 kit is the definitive choice.

Superior Scavenging and Structural Rigidity

What sets the Feuling HP+ kit apart in the 2026 marketplace is the legendary Feuling High-Flow Oil Pump. In the high-output 2026 environment, oil management is the key to longevity. This pump increases oil pressure and scavenging volume significantly, which reduces “sumping” and lowers oil temperatures by up to 30 degrees. This increased flow ensures that your lifters stay pumped up and your top-end stays quiet during intense 2026 summer riding. The included HP+ Billet Cam Plate is machined from 7075 aluminum, which is significantly stronger than the stock cast plate, preventing the flex that leads to oil pressure loss. This ensures the high-output 2026 presence and mechanical synchronization required to eliminate the “ticking” often heard in performance Twin Cams. This kit is a complete engineering upgrade that protects your investment while delivering massive torque gains.

Expert Installation & Performance Advice

As specialists in early Twin Cam architecture, we recommend the 525 kit for riders who want “stump-pulling” torque for two-up touring in 2026. Pro Tip: To truly maximize the 2026 potential of the 525 cams, pair this kit with a high-flow air cleaner and 2-into-1 exhaust to allow the engine to breathe properly. Installation Note: We highly recommend upgrading to Full-Complement Timken Inner Cam Bearings during this 2026 installation to ensure total bottom-end security. Maintenance Note: Use a high-quality 20W-50 synthetic oil and change the filter after the first 500 miles of 2026 break-in to ensure the new cam surfaces seat perfectly. Safety Note: While this is a bolt-in cam, a fuel map recalibration via Dynojet Power Vision or a properly jetted carburetor is mandatory to prevent lean conditions during your 2026 travels.

The Professional Standard for Early Twin Cam Longevity

Choosing the Feuling HP+ 525 Camchest Kit means investing in unmatched mechanical stability and a refined power signature. It offers a unique combination of modern metallurgical strength and a proven design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling is the unmatched leader. Power the ride, cool the heart, and ride the distance.

Features:

• Bulletproof your engine with maximum reliability
• 25-35 degree cooler engine temperatures
• 15-30 degree cooler oil temperatures
• 15-30 more pounds of oil pressure
• More power
• Quieter and smoother engine operation
• Eliminate wet sumping, blow by and oily air cleaners

525 Cam Info:

525 cams are a real workhorse, designed to increase torque band width and increase fuel economy. Great bolt in camshaft upgrade for stock 88 & 96 engines also performs very well in 103 strokers. Produces strong low and mid range power with a linear horsepower and torque curve. Can be used with factory valve springs, pushrods and lifters. Increases throttle response and eases starting. Will also respond well to increased compression and cylinder head work. RPM 1,750 – 5,500

• Intake open/close 4°/42°
• Exhaust open/close 51°/5°

• Intake duration 226°
• Exhaust duration 236°

• Intake Lift .525″
• Exhaust Lift .535″

Feuling HP+ 574: Re-Engineering the Twin Cam Heart for 2026

The Feuling HP+ 574 Camchest Kit for 2006-2017 Harley-Davidson Twin Cam models represents the 2026 pinnacle of valvetrain and lubrication synchronization. For many Twin Cam owners, the factory oiling system is the “weak link” that leads to excessive top-end heat and mechanical noise. Feuling addresses this by providing a total cam chest solution. The 574 camshaft is a highly versatile “Reaper” series grind that provides a wicked increase in power from 2,100 to 5,700 RPM. Because it is designed to work with stock valve springs, it is the ultimate high-performance 2026 bolt-in solution for 96″, 103″, and 110″ engines. For the rider seeking secure, industrial-strength utility and an engine that stays cool under the most demanding 2026 conditions, the Feuling HP+ 574 kit is the definitive choice.

Superior Scavenging and Structural Integrity

What sets the Feuling HP+ kit apart in the 2026 marketplace is the legendary Feuling High-Flow Oil Pump. In the high-output 2026 environment, oil management is everything. This pump increases oil pressure and scavenging volume significantly, which reduces “sumping” and lowers oil temperatures by up to 30 degrees. This increased flow ensures that your lifters stay pumped up and your piston cooling jets are operating at maximum efficiency. The included HP+ Billet Cam Plate is machined from 7075 aluminum, which has a thermal expansion rate much closer to the engine cases than stock cast plates. This ensures the high-output 2026 presence and mechanical synchronization required to eliminate the “ticking” often heard in performance Twin Cams. This kit is a complete engineering upgrade that protects your investment while delivering massive power gains.

Expert Installation & Performance Advice

As specialists in Twin Cam valvetrain architecture, we recommend the 574 kit for riders who want “big-cam” power with “stock-like” reliability. Pro Tip: To truly maximize the 2026 potential of the 574 cams, pair this kit with a high-flow intake and 2-into-1 exhaust to allow the cams to breathe properly. Installation Note: Always check your inner cam bearings during installation; we highly recommend upgrading to full-complement Timken bearings for the 2026 season. Maintenance Note: Use a high-quality 20W-50 synthetic oil and change the filter after the first 500 miles of 2026 break-in to ensure the new cam surfaces seat perfectly. Safety Note: Upgrading to a 574 cam requires a professional fuel map recalibration via Dynojet Power Vision to ensure your 2026 engine remains bulletproof and powerful.

The Professional Standard for Twin Cam Engine Longevity

Choosing the Feuling HP+ 574 Camchest Kit means investing in unmatched mechanical stability and a refined power signature. It offers a unique combination of modern metallurgical strength and a proven design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling is the unmatched leader. Power the ride, cool the heart, and ride the distance.

Features:

• These cam chest kits take the guess work out of the ordering process and guarantees the engine builder maximum reliability, peak performance and the coolest engine and oil temperatures obtainable
• Cam chest Kits include: oil pump, cam support plate, camshafts, lifters, pushrods, bearings, gaskets, O-rings and ARP hardware
• The Reaper camshaft profiles produce more power and more torque increasing cranking compression, improving throttle response, acceleration and fuel mileage
• 574 Cams have a wicked power band for modified engines and are the go-to choice for 110″ engines
• This is a great all around camshaft with solid low end performance and mind blowing mid and top end power
• Works best with modified cylinder heads, increased compression ratio, performance exhaust and intake systems
• Performance valve springs & gear set are required to complete installation
• RPM 2,100 – 6,500

Feuling EV-6 High-Flow Injectors: Precision Fueling for Twin Cams in 2026

The Feuling EV-6 Fuel Injector for 2006-2017 Harley-Davidson Touring, Softail, and Dyna models represents the 2026 pinnacle of intake science for the Twin Cam platform. In the world of performance V-Twins, the fuel system is the lifeblood of the engine. While the stock injectors are adequate for a Stage 1 setup, they quickly become the bottleneck when high-lift cams, high-flow cylinder heads, or increased displacement are introduced. Feuling addresses this by providing high-precision injectors that deliver a larger volume of fuel with a highly refined spray pattern. This ensures that even at high RPM and wide-open throttle, your engine receives the exact amount of fuel required to maintain the ideal air-fuel ratio. For the rider seeking secure, industrial-strength utility and an engine that pulls hard all the way to the redline, Feuling injectors are the definitive 2026 solution.

Advanced Atomization and Tuning Stability

What sets Feuling injectors apart in the 2026 marketplace is their ability to maintain surgical precision at every pulse width. Unlike generic high-flow injectors that can “drip” or provide an uneven spray, Feuling units feature an optimized multi-hole nozzle. This creates a fine mist of fuel that mixes more efficiently with the incoming air, resulting in a more complete combustion cycle. This efficiency translates directly into crisper throttle response and cooler cylinder head temperatures during the intense heat of 2026 summer riding. By providing the high-output 2026 presence required for competitive performance, these injectors allow your tuner to dial in a rock-solid map that delivers linear power without the “flat spots” caused by fuel starvation. This is the mechanical synchronization required for a professional-grade Twin Cam build.

Expert Installation & Performance Advice

As specialists in Twin Cam performance architecture, we recommend Feuling injectors for any build aiming for 100+ horsepower. Pro Tip: When selecting your flow rate in 2026, consult with your tuner; for most Stage 2 builds, the 4.9 g/s or 5.3 g/s injectors provide the perfect balance of headroom and idle stability. Installation Note: Lubricate the injector O-rings with a tiny amount of clean engine oil before seating them into the fuel rail to prevent tears and 2026 vacuum leaks. Maintenance Note: Use a high-quality fuel system cleaner periodically to keep the fine nozzle holes free of carbon deposits during your 2026 travels. Safety Note: Upgrading injectors requires an immediate ECU recalibration (calibration of the “Injector Size” constant) via Dynojet Power Vision to ensure the bike will start and run safely throughout the 2026 season.

The Professional Standard for Twin Cam Fuel System Integrity

Choosing Feuling Fuel Injectors means investing in unmatched mechanical stability and a refined power delivery. It offers a unique combination of modern fluid dynamics and a robust design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling is the unmatched leader. Fuel the fire, maximize the power, and ride the distance.

Feuling EV-6 Fuel Injector For Harley Touring / Softail / Dyna

Quality OEM replacements and upgrades.

Features:

• EV-6 USCAR Connectors
• Flow rate in “grams per second”
• Sold individually

3.91 gps Injector Info:

• For models with OE 46mm throttle body
• Updated 25 Degree angle cone spray pattern
• Replaces OEM 27625-06 / 27709-06 / A

Feuling High-Flow Injectors: Precision Fueling for the M8 Era

The Feuling Fuel Injector for 2017-2026 Harley-Davidson Touring and Softail models represents the 2026 pinnacle of intake science. In the world of Milwaukee-Eight performance, the fuel system is the lifeblood of the engine. While the stock injectors are adequate for a Stage 1 setup, they quickly become the bottleneck when high-lift cams or increased displacement are introduced. Feuling addresses this by providing high-precision injectors that deliver a larger volume of fuel with a highly refined spray pattern. This ensures that even at high RPM, your engine receives the exact amount of fuel required to maintain the ideal air-fuel ratio. For the rider seeking secure, industrial-strength utility and a engine that pulls hard all the way to the redline, Feuling injectors are the definitive 2026 solution.

Advanced Atomization and Tuning Stability

What sets Feuling injectors apart in the 2026 marketplace is their ability to maintain surgical precision at every pulse width. Unlike generic high-flow injectors that can “drip” or provide an uneven spray, Feuling units feature an optimized multi-hole nozzle. This creates a fine mist of fuel that mixes more efficiently with the incoming air, resulting in a more complete combustion cycle. This efficiency translates directly into crisper throttle response and cooler cylinder head temperatures during the intense heat of 2026 summer riding. By providing the high-output 2026 presence required for competitive performance, these injectors allow your tuner to dial in a rock-solid map that delivers linear power without the “flat spots” caused by fuel starvation. This is the mechanical synchronization required for a professional-grade Milwaukee-Eight build.

Expert Installation & Performance Advice

As specialists in Milwaukee-Eight performance architecture, we recommend Feuling injectors for any build exceeding 110 horsepower. Pro Tip: When selecting your flow rate in 2026, consult with your tuner; for most Stage 2/3 builds, the 6.1 g/s or 6.2 g/s injectors provide the perfect balance of headroom and idle stability. Installation Note: Lubricate the injector O-rings with a tiny amount of clean engine oil before seating them into the fuel rail to prevent tears and 2026 vacuum leaks. Maintenance Note: Use a high-quality fuel system cleaner periodically to keep the fine nozzle holes free of carbon deposits during your 2026 travels. Safety Note: Upgrading injectors requires an immediate ECU recalibration (calibration of the “Injector Size” constant) via Dynojet Power Vision to ensure the bike will start and run safely throughout the 2026 season.

The Professional Standard for M8 Fuel System Integrity

Choosing Feuling Fuel Injectors means investing in unmatched mechanical stability and a refined power delivery. It offers a unique combination of modern fluid dynamics and a robust design that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, Feuling is the unmatched leader. Fuel the fire, maximize the power, and ride the distance.

Features:

• Injector has EV-6 USCAR type connector
• Sold individually

Feuling OE+: The Definitive Reliability Fix for Early Twin Cams

The Feuling OE+ Hydraulic Cam Chain Tensioner Conversion Kit for 2001-2006 Harley-Davidson models represents the 2026 pinnacle of preventative engine maintenance. For many years, the early Twin Cam engine was plagued by a design flaw in its spring-loaded cam chain tensioners, which could wear prematurely and send plastic debris into the oiling system, leading to catastrophic engine failure. Feuling addresses this by providing a comprehensive hydraulic conversion system. By switching to hydraulic tensioners, the system maintains a more consistent pressure on the chains across all RPM ranges, significantly reducing wear and providing a much quieter valvetrain. For the rider seeking secure, industrial-strength utility and long-term 2026 reliability, the Feuling OE+ conversion is the most important upgrade you can perform on a classic Twin Cam.

Billet Engineering and Enhanced Oil Flow

What sets the Feuling OE+ kit apart in the 2026 marketplace is that it doesn’t just fix the tensioners; it overhauls the entire oiling ecosystem. The kit includes the Feuling OE+ Billet Oil Pump and Cam Plate, which are precision-machined to provide a 20% increase in oil pressure and a 25% increase in scavenge volume over stock 2001-2006 components. This improved flow ensures that your top-end stays lubricated during the high-stress demands of 2026 summer riding, while also helping to lower overall engine temperatures. The cam plate is engineered from high-grade 6061 billet aluminum, offering far more structural integrity than the factory cast plates, which can flex and cause oil pressure loss. Every component is hand-inspected and performance-verified to ensure your engine receives the high-output 2026 presence and durability it deserves.

Expert Installation & Performance Advice

As specialists in Twin Cam restoration, we recommend the OE+ kit for any bike with over 20,000 miles. Pro Tip: When performing this conversion, you must use 2007-up style camshafts as the early cams do not have the proper surface for the hydraulic conversion plate. Installation Note: It is the professional standard to replace your inner cam bearings with high-performance Koyo/Torrington bearings (sold separately) while the cam chest is open for your 2026 service. Maintenance Note: Use a high-quality 20W-50 synthetic oil to ensure the hydraulic plungers operate smoothly and the plastic pads maintain their resilience. Safety Note: Always verify your oil pump alignment during installation; an improperly aligned pump can lead to premature wear and oil pressure fluctuation during your 2026 travels.

The Professional Standard for Twin Cam Reliability

Choosing the Feuling OE+ Hydraulic Tensioner Conversion Kit means investing in unmatched mechanical stability and a refined riding experience. It offers a unique combination of modern hydraulic science and a robust construction that honors the performance legacy of the Harley-Davidson brand. For the rider who wants a high-output 2026 presence and a flawless engineering finish, the Feuling OE+ Kit is the unmatched leader. Secure your engine, quiet the noise, and ride the distance.

Features

• Includes a Feuling OE+ billet oil pump and camplate, Feuling billet hydraulic tensioners, cam chains, sprockets, sprocket alignment spacers, TIMKEN / Feuling bearings, needed gaskets, O-rings, ARP cam, crank and tensioner hardware, Loctite, and moly lube
• Rocker box gasket included so the factory one piece pushrods can be reused
• Will not work on keyway camshafts or with conversion camshafts

Product Style	AmericanV-twin Item #	Catalog Number	Store Sku	MFR. Product #	Availability
Feuling OE+ Hydraulic Cam Chain Tensioner Conversion Kit For Harley 2001-2006	81901	600-1418		7090	In Stock: Ships within 24 hours