PROFORM 66864 Shaft-Mounted Billet Roller Rockers for Buick 455, 1.65 Ratio

Upgrade the valvetrain of your Big Block Buick with PROFORM Part Number 66864 shaft-mounted billet roller rockers. Designed for Buick 455 applications, this rocker arm kit combines rigid shaft mounting with full-roller construction to support consistent valvetrain operation and reduced friction. The 1.65:1 ratio can help optimize valve lift when matched with your camshaft and engine combination.
The rockers are manufactured from lightweight aluminum and finished with a durable purple anodized coating for corrosion resistance and a distinctive appearance. Full-roller tips help reduce friction at the valve stem, while the shaft-mounted design provides stable rocker alignment and dependable operation in high-performance applications. This kit is intended for enthusiasts and builders seeking improved valvetrain performance without sacrificing practical installation and durability.
PROFORM 66864 is engineered specifically for Big Block Buick 455 engines and should be used with compatible cylinder heads, rocker shafts, pushrods, valve springs, and other valvetrain components. Verify application compatibility, required clearances, and rocker geometry before installation. Proper adjustment and lubrication are essential for reliable service and long-term performance. The kit is not air restricted and does not require truck freight shipping.

Features:

• Brand: PROFORM

• Part Number: 66864

• Application: Big Block Buick 455

• Rocker Type: Shaft-mounted billet roller rocker kit

• Ratio: 1.65:1

• Tip Design: Full roller

• Material: Aluminum

• Finish: Purple anodized

• Installation: Designed for compatible Buick 455 valvetrain assemblies