Ultra Pro Magnum Roller Rocker Arms 3/8" Stud Dia, 1.7 RatioSuit BB Chev 348-409 "W-Head"Brand: COMPPart Number: CO1629-16Description: Ultra Pro Magnum Roller Rocker Arms not only live up to the lofty standards of the original Pro Magnums, but theyalso take stud mount rocker performance, stability and value to a whole new level. The 8650 chromemoly material and arched, web-like design deliver increased strength andrigidity 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" locks without clearance or fitment issues.
- Chevy V8 348-409 cid - 3/8" Stud - 1.7 Ratio
- Investment cast 8650 chromemoly body and arched, web-like design deliver increased strength andrigidity while still reducing the moment of inertia. Unique black oxide exterior finish helps prevent corrosion and increases durability.
- Optimized retainer and valve spring clearances allow for use of most diameter springs, retainers and +.050" locks without clearance or fitment issues.
- Feature oversized trunions, precision-sorted needle bearings and hardened roller tips.
- For use with up to 850 lbs of open spring pressure.
