When you’re adding more performance to your small-block Chevrolet engine, eventually you’ll reach the point where shaft-mount rocker arm systems will become a great improvement for the stability of your valvetrain. High-RPM and sustained operation are two instances where the increased stability of the shaft design will improve performance, so maybe it’s time to check out these sweet new Scorpion Performance Endurance Series pieces offered at Summit Racing.

Official Release:

Over-engineered, track tested, and made in the USA, Scorpion Endurance Series Rocker Arm Kits for small block Chevy offer no-compromise performance. Shaft rockers are stronger and provide more stable valve timing versus traditional stud mount rocker arms. Precision CNC-machined to exact specifications, each rocker has a fully radiused body with a needle bearing fulcrum and a 4140 heat-treated steel stand. These full-roller arms weigh just 120 grams each, yet are still able to handle the stress of a racing environment.

Scorpion Endurance Series Rocker Arm Kits are available for 1955-99 small Chevy engines and come in 1.5, 1.6, 1.7, 1.5/1.6, and 1.6/1.7 ratios. They’re sold in sets of 16 and include all mounting hardware and assembly lube.

Features:

• Shaft rockers provide more stable valve timing
• Fully radiused body with needle bearing fulcrum
• 4140 steel heat treated stands
• Available for 1955-99 Small Block Chevrolet engines