Feuling HP+ 525 Camchest Kit For Harley Twin Cam 1999-2006

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″