Ultra Pro Magnum XD™ Roller Rocker Arms: SBC; 1/2" Stud, 1.5 Ratio

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 & rigidity while reducing the moment of inertia & optimizing dynamic balance
• Ultra Pro Magnum™ XD Rockers feature a machined billet pushrod seat insert for a super-accurate ratio