Feuling 525 Cam Kit For Harley Twin Cam
Mid-Range Dominance: Feuling 525 Cam Kit for Harley Twin Cam (1999–2006 )
The Feuling 525 Cam Kit is one of the most popular and versatile performance upgrades for the entire range of Harley-Davidson Twin Cam engines. Designed by Feuling Parts, a company renowned for its precision valvetrain components, the 525 cam is engineered to deliver a massive increase in low and mid-range torque and horsepower, making it an ideal choice for the vast majority of street riders and touring enthusiasts.
Engineering for Usable Street Power
The Feuling 525 Cam is specifically ground to enhance the power delivery characteristics most valued by riders: instant throttle response and strong passing power. It is designed to work efficiently with the engine’s stock components, minimizing the cost and complexity of the upgrade.
The Versatile Bolt-In Advantage
The Feuling 525 Cam is celebrated for its bolt-in nature. The lift is engineered to be compatible with most stock or mild aftermarket cylinder heads and compression ratios (under 10.5:1). This means that for most Twin Cam engines, the 525 Cam does not require specialized valve spring replacement, simplifying installation and minimizing downtime and overall cost. It is an excellent bolt-in Twin Cam performance cam choice.
The Comprehensive Kit: Beyond the Camshaft
Feuling typically packages their cams in comprehensive kits designed for reliability and ease of installation, offering different options depending on the model year of your Twin Cam.
A Focus on the Cam Plate
Feuling is a leader in improving the critical cam plate area of the Twin Cam engine. Their kits often include, or are designed to be paired with, their precision-machined components:
Feuling High Volume Oil Pump: The kits are frequently paired with Feuling’s proprietary high volume and high pressure oil pumps. These pumps are crucial for enhancing engine longevity by providing superior oil scavenging (especially important for the Twin Cam’s breather system) and maintaining consistent oil pressure to the lifters and internal components, particularly in high-demand situations.
Feuling Billet Cam Plate: Upgrade kits often include Feuling’s billet aluminum cam plate, which is stronger, more rigid, and provides better oil passages than the stock cast unit, ensuring optimal alignment and performance for the new cams.
Chain Drive vs. Gear Drive
Feuling offers the 525 Cam in both chain drive (which uses the stock tensioner system) and gear drive configurations.
Gear Drive (Recommended for Pre-2007): The gear drive option eliminates the failure-prone stock chain tensioner shoes entirely, making it the most durable and maintenance-free choice for performance builds.
Chain Drive (For 2007-Later): The chain drive option is common for later models and is generally compatible with the factory hydraulic tensioners.
Target Audience and Performance
The Feuling 525 Cam Kit is the ideal solution for:
Touring Riders: It provides the grunt needed to move heavy bags and passengers easily.
Daily Commuters: The cam offers a smooth idle and excellent street manners without being overly aggressive.
Performance Enthusiasts: It delivers maximum power without requiring expensive head work or high-octane fuel.
Supporting Modifications
As with any cam upgrade, maximizing performance requires supporting systems:
Air/Exhaust: A high-flow air cleaner and a free-flowing performance exhaust system are mandatory to feed and scavenge the engine properly.
Tuning: A proper EFI tuner and a dyno tune are essential for adjusting the air/fuel mixture and ignition timing to match the new cam profile, ensuring reliability and peak power delivery.
The Feuling 525 Cam Kit stands out as the go-to Harley Twin Cam Mid-Range Cam for riders seeking a dramatic, reliable increase in usable street power for their 1999–2006 model.
| Product Style | AmericanV-twin Item # | Catalog Number | Store Sku | MFR. Product # | Availability |
|---|---|---|---|---|---|
| Chain Drive Cams | 1566204 | 505-547 | 1001 | In Stock: Ships within 24 hours | |
| Gear Drive Cams | 1566203 | 420-420 | 1004 | In Stock: Ships next business day |
This Product Fits
Harley Davidson
Dyna Convertible FXDS 1999, 2000
Dyna Low Rider FXDL/I 1999-2005
Dyna Super Glide Custom FXDC/I 2005
Dyna Super Glide FXD/I 1999-2005
Dyna Super Glide Sport FXDX 1999-2005
Dyna Super Glide Sport Touring FXDXT 2001, 2002, 2003
Dyna Wide Glide FXDWG/I 1999-2005
Electra Glide Classic FLHTC/I 1999-2006
Electra Glide Standard FLHT/I 1999-2006
Electra Glide Ultra Classic FLHTCU/I 1999-2006
Road Glide FLTR/I 1999-2006
Road King Classic FLHRC/I 1999-2006
Road King Custom FLHRS/I 2004, 2005, 2006
Road King FLHR/I 1999-2006
Softail Deluxe FLSTN/I 2005, 2006
Softail Deuce FXSTD/I 2000-2006
Softail Fat Boy FLSTF/I 2000-2006
Softail Heritage Classic FLSTC/I 2000-2006
Softail Heritage FLST/I 2006
Softail Heritage Springer FLSTS/I 2000, 2001, 2002, 2003
Softail Night Train FXSTB/I 2000-2006
Softail Springer Classic FLSTSC/I 2005, 2006
Softail Springer FXSTS/I 2000-2006
Softail Standard FXST/I 2000-2006
Street Glide FLHX/I 2006
