M8 8mm Base to 3/8" Rocker Arm Screw In Stud Kit (1.380" Above Hex) Chevy GM LS The belts use a fiberglass

The belts use a fiberglass cord wound across the entire width of the belts to minimize stretching

Mounting hardware is included

Take your GM TH400 transmission to the next level with this premium heavy duty forward drum and 300M input shaft combo

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

500 RPM for explosion proof racing application

M8 8mm Base to 3/8" Rocker Arm Screw In Stud Kit (1.380" Above Hex) Chevy GM LS The belts use a fiberglassSpeedmaster 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.