Rocker Locker Rocker Locking Kit For Harley 1999-2017

Factory tappet guides are constructed of plastic and are at risk for allowing the tappets to twist under heavy stress. S&S Tappet Cuffs capture the tappets without impacting vertical motion and keeps them perfectly aligned, even in high stress, high RPM situations.

Big lift cams can open up the high rpm potential of the M8 powerplant, but they can also cause their own issues due to the extra stresses and stock valvetrain geometry. Excessive valve thrust and valvetrain wear drove S&S Cycle engineers to design stronger, more durable components that will help you get the most out of your M8. S&S Cycle Forged Roller Rocker Arms for M8 models are stronger, more durable and easier on the rest of your valvetrain, and are essential for increasing the longevity of your valvetrain components on cams with greater than .550″ lift.