Chevy GM LS1 LS3 LS7 Super Timing Gear Drive Set Our rear-ends have a reputation

Our rear-ends have a reputation for being tough to handle the abuse of Circle Track

improved throttle response and better fuel economy

and hardware

Couple this Hi-Ram intake with the high flowing LS1 style cylinder heads has outstanding potential for naturally aspirated and forced induction applications

The successful formula of offering a complete engine drive accessory kit has now been applied to the Serpentine with Speedmaster pulley systems

Chevy GM LS1 LS3 LS7 Super Timing Gear Drive Set Our rear-ends have a reputationSpeedmaster 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.