FEULING OIL PUMP CORP. 508 Cam - Chain Drive - Harley-Davidson 2017-2021 - M8 1349

508 CAM - 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. FEULING recommends matching this cam with our RACE SERIES oiling system.

NOTE: High Lift valve springs are required on stock cylinder heads, see FEULING BEEHIVE valve spring kit #1107 (DRAG# 0926-2973) or #1108 (DRAG# 0926-2974). SE cylinder heads have high lift valvesprings and will accept the 508 and 521 grind cam. Heavy Duty one piece pushrods are also highly recommended see #4087.


Part # 1349 RPM range 2,250 - 5,900. Grind: 508

.................. Valve Lift Open Close Duration @ 50 lift @ TDC Lobe Centerline
Intake .508 20.5 BTDC 37 ABDC 237 .180 98.5
Exhaust .511 44 BBDC 17.5 ATDC 241.5 .146 103.25
Overlap: 38

*Cam specs measured in the engine on the lifter @ 0.050 using a 1.61 rocker arm ratio

• 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” (EU: 1,87 L) 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

Fitment Guide

Specs