• 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

Notes

• 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.