How do roller rockers extend the life of cylinder heads?
The standard non roller rocker type of rocker arm pushes and pulls the valve stem sideways every time the valve is opened. This causes the guides to wear prematurely, which in turn causes the valve seat to deteriorate. With a roller rocker, the roller rocker tip prevents this side loading, giving the guide and stem the best chance of survival, making them ideal for not only performance engines, but standard engines as well.
