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 114in. 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 508 cam with Race Series oiling system.

Requires high lift valve springs.

Heavy-duty pushrods are highly recommended;.