APR Supercharger Crank Pulley - 3.0 TFSI (MS100133) 1806 Exhaust Tubing Material: 409 SS

Exhaust Tubing Material: 409 SS

Kit also comes complete with factory toe lock out washers to maintain desired settings

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6 hub hole Description_ASM Front S4K FMSI D784 2004 GMC Sierra 1500 1/2 Ton Extended Cab HD 4

Durable Polyurethane

APR Supercharger Crank Pulley - 3.0 TFSI (MS100133) 1806 Exhaust Tubing Material: 409 SSAPR's Supercharger Drive and Crank Pulley Upgrades dramatically increase horsepower and torque by increasing the rotational speed of the factory supercharger. APR's Stage II Pulley ECU Upgrade makes the necessary engine management adjustments to handle the increased supercharger speeds, and in turn allows the engine to create more power. The pulleys are sold separately, allowing for multiple levels of performance, each of which builds upon the other.