Ford 351C Cleveland Dual Idler Noisy Timing Gear Drive Set you must use one that

you must use one that is also approved as street legal for your application

The TorqueWorm is a torque bias

improving belt retention and reducing the risk of slippage

Trust Speedmaster to give you timing sets that will deliver accurate

with the performance and durability required to reach the winner's circle

Ford 351C Cleveland Dual Idler Noisy Timing Gear Drive Set you must use one thatSpeedmaster 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.