COMP Cams 1629-1 Ultra Pro Magnum Roller Rocker Arm with 1.7 Ratio and 3/8" Stud Diameter for Chevrolet 348-409 Engine

The Ultra Pro Magnum Roller Rocker Arms for Chevy V8 348-409 applications not only live up to the lofty standards of the original Pro Magnums, but they also take stud mount rocker performance, stability and value to a whole new level. These rocker arms feature a 3/8 inch stud diameter and 1.7 ratio. The 8650 chromemoly material and arched, web-like design deliver increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. A unique black oxide exterior finish helps prevent corrosion and increases durability. Featuring oversized trunions, precision-sorted needle bearings and hardened roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050 inch locks without clearance or fitment issues.

• For 348-409 chevrolet V8 applications, 1.7 ratio, 3/8 inch studs
• Investment cast 8650 chromemoly body and arched, web-like design deliver increased strength and rigidity while reducing moment of inertia
• Unique black oxide exterior finish helps prevent corrosion, thus increasing durability
• Optimized retainer and valve spring clearances allow use of most diameter springs, retainers and +.050 inch locks without clearance or fitment issues
• Feature oversized trunions, precision sorted needle bearings and hardened roller tips