Stamped stock rockers drag on the valve stem and eat the tip, which costs power and eventually costs valves. A full roller rocker puts a needle bearing at the fulcrum and a roller on the tip, so the friction that was heating up your valvetrain turns back into horsepower and the stem tips stop wearing.

Proform 66907C Super-Street Full Roller Rocker Arm Features:

• Fits Small Block Chevy Gen 1 engines.
• 1.5 rocker ratio.
• 3/8 in. stud mount with a narrow body for valve cover clearance.
• Full roller design with a cage bearing fulcrum and roller tip.
• Clears springs up to 1.400 in. outside diameter.
• Aluminum body.
• Not self-aligning, for use with guideplates or guided rockers.
• Polylock nuts and fasteners included.
• Sold as a set.