Pontiac V8 Roller R/A's 1.65 Ratio 7/16 Stud

The Pontiac V8 Roller R/A's 1.65 Ratio 7/16 Stud from Scorpion Performance is designed for serious engine builders and performance enthusiasts who seek reliable rocker arm geometry. These roller rocker arms replace the restrictive stock stamped steel units found on Pontiac V8 platforms, providing measurable gains in top-end power and valve actuation precision.

The 1.65 rocker ratio on these Scorpion units enhances valve lift multiplication compared to the factory design, translating cam profile aggression into greater valve travel and duration on the seat. Needle roller bearings significantly reduce sliding friction at the pushrod cup, minimizing parasitic losses and heat generation, which is crucial for high-RPM stability and consistent valve timing.

These roller rocker arms are compatible with Pontiac V8 builds, specifically the 400, 421, and 455 displacements, and can be used with or without performance cam upgrades. Installation is straightforward, requiring basic mechanical skills to swap out old rockers, torque studs to specification, and adjust rocker geometry for optimal performance.