Ultra Pro Magnum Roller Rocker Arms for Chevy; 3/8" Stud, 1.52 Ratio

ULTRA Pro Magnum™ Roller Rocker Arms. The Ultra Pro Magnum™ Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnum™ Rockers, but they also take Stud mount Rocker performance, stability and value to a whole new level. The modern arched, web-like design delivers increased strength and rigidity while still reducing the moment of inertia and optimizing the dynamic balance. Applications: Chevrolet Small Block 265-400 c.i.d. V8 3/8" Studs / 1.52:1 Ratio.

• Investment cast 8650 chromemoly body and arched, weblike design deliver increased strength and rigidity while reducing M.O.I.
• Unique black oxide exterior finish helps prevent corrosion, thus increasing durability
• Increased retainer and valve spring clearances allow use of large diameter springs, retainers and +.050" locks with o clearance or fitment issues
• Feature Oversized trunnions, precision-sorted needle bearings and hardened Roller tips
• withstand valve spring pressures up to 850 lbs.
• Also Available in A Rocker/Pushrod Kit