As low as $77.01/mo with or . (Pay in 4 interest-free payments)
FEULING PARTS Reaper® 508 Cam (Chain Drive, M8) Unleash aggressive power with the FEULING PARTS Reaper® 508 Cam—engineered for strong torque in the riding RPM range. This 508 Series “Grim Reaper” grind sharpens throttle response , boosts acceleration , and helps improve fuel mileage where it matters most. With smooth cam lobe ramps, the Reaper 508 design is easier on the valvetrain , reducing excessive noise, wear, and harsh operation. Dyno proven and track tested, it revs up faster than the 521 grind, sounds nastier, and pulls harder—though it requires careful tuning for best results. Key Features More power and torque from the street riding RPM range (2250–5900) Smooth lobe ramps for quieter, easier valvetrain operation “Grim Reaper” aggressive pulling power and bold sound Ideal for 114" and larger engines with added compression Ported cylinder heads optional—recommended for even more pull Best with high-flow throttle body, exhaust, and air cleaner High-lift valve springs required High- duty pushrods recommended Made in the USA Technical Notes Cam specs are measured in the engine on the lifter at 0.050" using a 1.61 rocker arm ratio . For this 4-valve design, Feuling recommends one-piece pushrods (over quick-install adjustable pushrods) to maintain maximum lift and reduce valvetrain harmonics and hydraulic lifter issues. Specifications (Selected) Grind: 508 Series (Reaper) Type: Chain Drive; Application: Intake & Exhaust Intake Duration: 237°; Exhaust Duration: 241.5° Intake Lift (at TDC): 0.180"; Exhaust Lift (at TDC): 0.146" Intake Lift: 0.508"; Exhaust Lift: 0.511" Intake Lobe Centerline: 98.5°; Exhaust Lobe Centerline: 103.25° Weight: 1.51 lbs
Produce more power and torque in the riding RPM range, improving throttle response, acceleration and fuel mileage
Smooth camshaft lobe ramps are easier on valvetrain components and eliminate excessive valvetrain noise and wear
Dyno proven and track tested
The Grim Reaper aggressive pulling power with a nasty sound
This camshaft revs up faster than the 521 grind, sounds nastier and pulls harder, but is more difficult to tune
The Reaper 508 grind will shine in 114" and larger cubic inch engines with added compression ratio
Ported cylinder heads are not required, but will complement the cam and add even more pulling power throughout the range
The stock throttle body produces an excellent powerband and use of a high flow throttle body will increase peak power numbers
A high-flow exhaust system and air cleaner is highly recommended for optimal performance
High-lift valve springs are required
Heavy-duty pushrods are highly recommended
2250 - 5900 rpm range
Made in the USA
Cam specs measured in the engine on the lifter @ 0.050 using a 1.61 rocker arm ratio.
Due to the unstable nature of this 4-valve engine design with one rocker arm activating two valve springs, Feuling highly recommends running one-piece pushrods over quick-install adjustable pushrods to maintain maximum cam/ valve lift and reduce valvetrain harmonics and associated hydraulic lifter issues.
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