M8 8mm Base to 3/8" Rocker Arm Screw In Stud Kit (1.380" Above Hex) Chevy GM LS Supercharger idler pulley stand ensure

Supercharger idler pulley stand ensure optimal belt tension and alignment for smoother power delivery

and drag racing

Mounting hardware is included

They are ground and thread-rolled after heat treatment to ensure the exacting tolerances that Speedmaster requires for all of their fasteners

M8 8mm Base to 3/8" Rocker Arm Screw In Stud Kit (1.380" Above Hex) Chevy GM LS Supercharger idler pulley stand ensureSpeedmaster 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.