Aggressive pulling power with a “nasty” sound, the Reaper 521 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
Stock throttle body produces an excellent powerband; use of a high-flow throttle body may increase peak power numbers
A high-flow exhaust system and air cleaner is highly recommended for optimal performance
Rpm range 2250-6250
Made in the USA
Cam specs measured in the engine on the lifter @ 0.050 using a 1.61 rocker arm ratio.
Feuling recommends matching 521 cam with Race Series oiling system.
Requires high lift springs.
Heavy-duty one-piece pushrods are also highly recommended.
Garage
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