COMP Cams 1820-16 - Rocker Arms, Chevrolet Big Block, Ultra Pro XD, 7/16" Stud, 1.7:1 Ratio, Set of 16

The Ultra Pro Magnum™ XD Rocker Arms are engineered from durable 8650 steel that outlasts and outperforms other inferior knock-off and import rockers. A unique machined billet pushrod seat insert offers exceptional durability. These new stud mount rockers are fully rebuildable and use precision-sorted needle bearings and hardened roller tips to better distribute the load and reduce wear for a longer service life. In addition, they work with most diameter springs and retainers.

The XD design utilizes advanced FEA and CAD design and development to improve strength, stiffness and MOI optimization for endurance, drag and circle track applications. These rocker arms are so durable that they come with a lifetime guarantee against breakage. Only accept authentic “COMP” logo rocker arms to ensure quality and reliability. 

• Rockers for Chevy Big Block V8 396-454 - 7/16" Stud - 1.7 Ratio
• Suitable for use withup to 1000 lbsof open spring pressure!
• Billet pushrod seat insert offers exceptional durability
• 8650 steel construction outlasts & outperforms other rockers in accuracy and strength
• Precision-sorted needle bearings better distribute the load and reduce wear for a longer service life
• Advanced FEA & CAD development improve strength & stiffness
• Engineered for use in endurance, circle track and drag race applications with improved strength and durability
• Lifetime Warranty- So strong that we guarantee the rocker bodies against breakage for life!