Chevy GM LS1 LS3 LS7 Super Timing Gear Drive Set and header clearance

and header clearance

These Speedmaster supercharger manifolds are aluminum constructed and suitable for competition or street use

1966-72 (1973 non-CA) passenger cars

and have a maximum pressure of 7 psi with an externally accessible pressure relief valve

Speedmaster pulley systems work with any type of cylinder head or manifold configuration

Chevy GM LS1 LS3 LS7 Super Timing Gear Drive Set and header clearanceSpeedmaster gear drives are great for you folks who want better timing. Their dual idler design has CNC machined components and they are easy to install. These drives fit under your stock timing cover and come complete with instructions. Minor machining may be required on some applications.