Comp Ultra Pro Magnum Roller Rocker Arms - (SB Ford 1.6 Ratio)
The Comp Cams "Ultra Pro Magnum" roller rocker arms for Ford V8 289-302-351W 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. The 8650 chromemoly material and high 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 looks great and helps prevent corrosion as well as increases durability.
Featuring oversized roller bearing trunnions, precision-sorted needle bearings and hardened roller tips for the ultimate in performance and dependability. Optimized retainer and valve spring clearances allow for the use of most large diameter springs, retainers and +.050" locks without clearance or fitment issues.
These small block Ford rocker arms feature a 1.60:1 ratio and require a 3/8" rocker stud diameter. Due to the larger trunnion bearing diameter, some cylinder heads require a slightly longer rocker stud for full poly-lock engagement.
PART NUMBER: COMP-1631-16
