Comp Cams Ultra Pro Magnum Rocker steel rocker arms have been completely redesigned for reduced weight, greater strength and improved valve train stability. Years of valve train design experience are combined with the latest FEA stress analysis technology and an exhaustive testing insure that Ultra Pro Magnum Rocker Arms not only live up to the lofty standards of their predecessor but also took stud mount rocker performance, stability and value to a whole new level.
The most noticeable advancement centers around their nearly unbreakable investment cast 8650 chrome moly body. The arched web-like design delivers a nearly 29% increase in strength and rigidity while reducing the moment of inertia and optimizing the dynamic balance. The resulting rocker maximizes lift and valve train control at high rpm. The increased retainer and valve spring clearances of the new design enable the use of large diameter valve springs, retainers and locks without clearance or fitment issues. Comp Cams includes a lifetime guarantee against the breakage of the rocker arm body for any reason. The new black oxide exterior finish offers a distinctive appearance along with long term corrosion resistance. The Ultra Pro Magnum arms feature an oversized trunion and precision-sorted needle bearings for use with high load valve springs. Additionally, these unique rockers also feature hardened roller tips for reduced friction and elimination of the valve stem side loading that causes premature guide wear. These new rockers feature a fully rebuildable design. We found then as part number 249-1331-16 with a cost of $285.99. (800) 999-0853 www.compcams.com.