COMP Cams® belt drives represent the ultimate in cam timing systems. Our belt drives are designed to absorb a significant amount of crankshaft harmonics, which will affect valve motion if they reach the valve train. COMP Cams® belt drives require less power to operate than conventional belt drives. Last but not least, our belt drives have proven to be more durable than either gear or chain drives.Fits Chevrolet Big Block with standard cam location

• Excellent for all NASCAR and NHRA applications

• Unique camshaft thrust adjustment system does not require the use of shims to set end play

• Belt idler reduces belt “flap”

• High performance belt

• Idlers available in different diameters for align bored blocks

• Adjustable camshaft timing with simple Vernier sprocket

• Double lip oil seals ensure maximum crankcase vacuum