These are for roller rockers so one tip has 3/16 ball and the other 5/16

The billet heads have a taller rocker bridge for added strength and to allow for taller/larger ports. Use these pushrods with roller rockers and billet heads

Never use stock/aluminum pushrods on performance applications. When others state “aircraft grade material” without writing what the material actually is that means aluminum, don’t be fooled. These pushrods bounce and create valve float. Valve float costs power.