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 the RACE SERIES oiling system FMC-7097. High lift valve springs are required, see FEULING ENDURANCE BEEHIVE valve spring kits FMC-1107, FMC-1108 or HIGHLOAD springs FMC-1207, HIGHLOAD requires the use of Feuling RACE SERIES lifters. Heavy duty pushrods are highly recommended see FMC-4087.

Specs:

• RPM range 2,250 - 6,250. Grind: 508
• 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

Fitment:

• 2017-Up Harley-Davidson Miwaukee Eight 114 and Larger Engines w/ Chain Drive Cam