The Ultra Pro Magnum™ Roller Rocker Arms not only meet the high standards set by the original Pro Magnums™ but exceed them. Crafted from 8650 chromemoly material with an arched, web-like design, these rocker arms deliver increased strength and rigidity while minimizing the moment of inertia and optimizing dynamic balance. The unique black oxide exterior finish prevents corrosion and enhances durability. With oversized trunions, precision-sorted needle bearings, and hardened roller tips, these rocker arms offer ultimate performance and dependability. Optimized retainer and valve spring clearances accommodate most diameter springs, retainers, and +.050" locks without clearance or fitment issues.
Chrysler 383-440 Big Block - Shaft Mounted - 1.5 Ratio*
- Investment cast 8650 chromemoly body and arched, web-like design enhance strength and rigidity while minimizing the moment of inertia.
- Unique black oxide exterior finish prevents corrosion and increases durability.
- Optimized retainer and valve spring clearances accommodate 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, guaranteeing rocker bodies against breakage for life, suitable for applications with up to 850 lbs of open spring pressure. *Requires ball/ball style pushrods.
- Local Pickup Available:
- No
- Local Delivery Available:
- No
- Additional Handling:
- No
