508 Cam – Chain Drive – M8

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 U.S.A.; 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