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COMP CAMS has a way for you to improve the performance and durability of your valve train with upgraded rocker arm components for your LS engines available from Marken Performance Kitchener, Ontario, Canada. The next generation of Ultra-Gold™ ARC Series Aluminum Rocker Arms from COMP Cams® replaces the stock uncaged needle bearings with a caged bearing trunion retrofit kit which enhances valve train stability. Engine power is increased as well as improved oiling while fitting under the stock valve covers. They feature an Arced, Recessed, Contoured design and are manufactured entirely in the U.S.A. using cutting edge design techniques and manufacturing processes to create the lightest, most durable rocker arms on the market today.

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  The next design evolution of the Hi-Tech™ Stainless Steel Roller Rocker Arms are built to outlast and outperform in accuracy and strength. The Ultra Pro Magnum™ XD Rocker Arms are engineered from durable 8650 steel and include a machined billet pushrod seat insert for a wide range of super accurate ratios. A unique and wide ratio range to fit almost any popular application from 1.5 to 1.73 in .5 increments for Chevy and 1.6 to 1.73 for various Ford applications is available. These XD rockers are fully rebuildable and boast precision-sorted needle bearings and hardened roller tips. And, they work with most diameter springs and retainers. The new XD design utilizes advanced FEA and CAD design and development to improve strength, stiffness and MOI optimization for drag and circle track applications.

 Machined billet pushrod seat insert for wide range of rocker ratios used in popular Chevy and Ford applications

 8650 steel construction outlasts and outperforms other rockers in accuracy and strength

 Precision-sorted needle bearings better distribute the load and reduce wear for a longer service life

 Engineered for use in endurance, circle track and drag race applications with improved strength and durability

 Ultra Pro Magnum™ XD Rocker Arms are so strong that we guarantee the rocker bodies against breakage for life.