Description

The Ultra Pro Magnum™ Roller Rocker Arms not only meet but exceed the high standards set by the original Pro Magnums™, pushing stud mount rocker performance, stability, and value to unprecedented heights. Crafted from 8650 chromemoly material with an arched, web-like design, these rocker arms enhance strength and rigidity while reducing the moment of inertia and optimizing dynamic balance. The unique black oxide exterior finish provides corrosion resistance and durability.

Key Features:

7/16″ Stud – 1.52 Ratio – Designed for Chevy V8 265-400 (SBC) with Twisted Wedge Heads. Specifically designed for intake valves, while Twisted Wedge heads use standard SBC exhaust valve rockers.
Investment cast 8650 chromemoly body with an arched, web-like design for increased strength and rigidity, minimizing the moment of inertia.
Unique black oxide exterior finish for corrosion prevention and enhanced durability.
Optimized retainer and valve spring clearances, accommodating most diameter springs, retainers, and +.050″ locks without clearance or fitment issues.
Oversized trunions, precision-sorted needle bearings, and hardened roller tips for superior performance and dependability.
Lifetime Warranty, ensuring rocker bodies against breakage for life, suitable for applications with up to 850 lbs of open spring pressure.