The latest development in Rocker arm Technology from COMP Cams are Ultra Pro Magnum XD Rocker Arms built for 1/2" Studs to increase valve train stiffness and stability. Designed to be used in conjunction with the COMP Cams Hi-Tech 1/2" Rocker Stud Kit the latest versions of COMP Cams Ultra Pro Magnum XD are built to utilize 1/2" Studs to stabilize SBC valve trains. Ultra Pro Magnum XD Rockers are built to outlast and outperform in accuracy and strength while maintaining all the benefits of the Ultra Pro Magnum version. The XD Rockers are engineered from durable 8650 Steel and include a machined billet Pushrod seat insert for a super-accurate ratio. The Rockers also boast precision-sorted needle bearings and hardened Roller tips. And since they now feature the added benefit of accepting 1/2" Studs they are a great choice for anyone looking for more stiffness with Stud mount Rockers. These new Ultra Pro Magnum XD Rocker Arms will provide the ultimate in valve train stability for maximum valve motion both at the track and on the street.

• 1/2" Studs provide a stiffer valve train to achieve maximum valve motion in SBC engines


• Deliver increased strength and rigidity while reducing the moment of inertia and optimizing dynamic balance


• Ultra Pro Magnum XD Rockers feature a machined billet Pushrod seat insert for a super-accurate ratio