Proform 66907 PFM66907 ALUM ROLR-ROKR SBC 1.5 R 3/8

went from stamped roller tip to full roller rockers. good move I belive, although didn't realize these were chineze made. seems that might have mattered when purchased. they are installed in small block chevy 4x4 with mild comp cam. we'll see how it works.

Bought these back in August. Since then I've only put 1000 miles on my truck. In no way did I run this engine hard. But last week the engine started making a banging sound. Opened up the valve covers to find that the rocker was broke in half. And all of my push rods are shaved. They touch the sides of the guide plates. I'm not sure if they need a different push rods or some extra piece for the valve. Idk. Learn from my mistake.