Features & Benefits:
* Utilizes 20% oversize rollers for improved performance under hard starting conditions
* Replaces OEM # 31663-90
Tech Tips:
* Advanced timing, High Compression, & Increased cubic capacity can cause failure of Ring Gear, Pinion Gear teeth & Starter Clutch
* S&S Easy Start Cams are the most reliable option for decreasing compression during start-up.
* Will Not Fit Dyna 2006
