Big lift cams can open up the high rpm potential of the M8 powerplant, but they can also add stress to the stock valvetrain geometry. Valve thrust and valvetrain wear in big lift cam applications drove the S&S engineers to design stronger, more durable components that will help you get the most out of your M8 and first on the list was Forged Roller Rocker arms. The new S&S M8 rockers are stronger, more durable, and designed to be easier on the rest of your top end. Oil routing is updated and is now sprayed directly on the valve springs, helping cool and lubricate these hard working parts. Compatible with stock or most CNC ported heads and featuring a 1.640 Ratio, capable of up to .650 valve Lift. An essential mod for increasing the longevity of your valvetrain components particularly with cams running .550 or greater lift. Making big reliable power has always been what S&S does best and the new Forged Roller Rockers are a solid addition to their M8 performance parts line! 

For more information about this product check out this link - https://www.sscycle.com/products/forged-roller-rocker-arms-for-m8-models/