An underdrive pulley is a replacement pulley that bolts up the same as stock, but has a different size (ratio) and material specifications intended to free up lost horsepower. By increasing the diameter of each accessory pulley and decreasing the size of the crank pulley, the speed at which the accessories are turning relative to engine RPM decreases.
Under drive pulleys do not add power to the engine, they free up the power that is normally wasted on overdriven accessories. The theory is that a larger pulley will drive the accessories slower thus reducing their parasitic horsepower loss.
Get back the power and torque your oversized stock accessory pullies steal. Bolt on up to 12hp horsepower with LFP's underdrive pulleys and increase mileage by 1 to 2 MPG. LFP Pulleys are manufactured from billet steel, exceeding factory quality and are the only Pulley system available on the market today that are SFI approved for all racing applications.
Installation: The kit includes all required components and hardware for a complete installation
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