The 508 Grim Reaper offers 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. High lift valve springs are required and heavy duty pushrods are highly recommended.
Features:
Aggressive puller, optimized for 114" or larger motors
2250-5900 rpm power range
Responds well to modified cylinder heads, increased compression ratio, performance exhaust and intake systems
High lift valve springs required
High performance pushrods and lifters recommended
Made in the USA
508 Cam Info:
Optimized for 114" and larger engines
Provides power increase across entire powerband
2250-5900 rpm power range
Must be used with high lift valve springs
Intake open/close 20.5°/37°
Exhaust open/close 44°/17.5°
Intake duration 237°
Exhaust duration 241.5°
Intake lift at TDC .180°
Exhaust lift at TDC .146°
Intake lobe centerline .98.5°
Exhaust lobe centerline .103.25°
Intake Lift .508"
Exhaust Lift .511"
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Please review this product's fitment notes & exceptions prior to purchase:
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This product will fit your 2018 Harley Davidson Road King Special FLHRXS
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