Fits 06-17 Big Twin models
Gear drive

High-power Cam for modified engines, increase compression, high-lift springs, adjustable pushrods, and large bore throttle body required. For best results, requires ported heads and low restriction intake/exhaust. RPM range from 4000-6500.

Start any engine regardless of displacement or compression ratio with a stock starter

Save your starter and battery; tested for 10,000 starts without running battery down

Allow for easy start by initially reducing crank compression, but once the engine starts and rpm increases, the compression release lobe is centrifugally retracted and the engine runs normally, with full compression, and without any loss in performance

All chain-drive cams include installation kit

All gear-drive cams include 4-gear set and installation kit

For 88/95/96/103 cubic-inch engines

Compression ratios below 10:1

Installer must check coil bind, valve-to-valve clearance and valve-to-piston clearance.

Due to the inherent characteristics of gear drives, you may experience more valve train noise.

Not for models with OEM compression releases.

Made in the U.S.A.

GRIND - 635 SERIES
INTAKE OPEN - 19.5°
INTAKE CLOSE - 43.5°
INTAKE LIFT - 0.635"
INTAKE DURATION - 243°
EXHAUST LIFT - 0.635"
EXHAUST DURATION - 276°
EXHAUST OPEN - 58.5°
EXHAUST CLOSE - 37.5°