5/16" Base To 7/16" Rocker Stud Set +0.500 Longer Late Ford Head Applications Available for different applications

Available for different applications

Speedmaster rocker arm adjusting nuts are high-quality polylocks designed for full roller rocker arms

Featuring thicker walls and more gusseting than any other manufacturer

Speedmaster aluminum LS valve covers will give your LS series engines a totally new look

5/16" Base To 7/16" Rocker Stud Set +0.500 Longer Late Ford Head Applications Available for different applicationsSpeedmaster arm stud kits are made of 4140 Chromoly steel. They're roll threaded, heat treated to a maximum strength of 190,000+ PSI. and have a black oxide corrosion resistant finish. They feature larger radius stud fillets for extra strength.