Pulleys - Crank

Replacement Belt for Underdrive Pulley Kit (D560-0003). This is one of 2 belts used by the Underdrive Pulley Kit. This belt attaches to the power steering and AC. Power Steering/Air Conditioning - E90/E92/E93 OEM+ quality belt

Dinan's underdrive pulley is designed to increase power (11 horsepower 8400 RPM and 7 lb-ft torque 8400 RPM on a stock car) by reducing parasitic drag on the engine from spinning the alternator, water pump and AC compressor. This is accomplished by...

Dinan's lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 13 percent, reducing parasitic drag on the engine for a 6 HP @ 8000 RPM and 4 lb-ft torque @ 8000 RPM gain on a stock vehicle. The Dinan underdrive pulley...

Replacement Belt for Underdrive Pulley Kit (D560-0004). This is one of 2 belts used by the Underdrive Pulley Kit. This belt attaches to the power steering and air conditioning. Power Steering/Air Conditioning - E90/E92/E93 OEM+ quality belt

Replacement Belt for Underdrive Pulley Kit (D560-0003 & D560-0004). This is one of 2 belts used by the Underdrive Pulley Kit. This belt attaches to the alternator and water pump. Alternator/Water Pump - E90/E92/E93 OEM+ quality belt

APR's Supercharger Drive Pulley Upgrade decreases the diameter of the factory pulley from ~63.25mm to 57.75mm, which in turn spins the supercharger ~9.5% faster. This results in a healthy bump in horsepower and torque across the entire RPM range with the...

APR's Supercharger Drive Pulley Upgrade decreases the diameter of the factory pulley from ~63.25mm to 57.75mm, which in turn spins the supercharger ~9.5% faster. This results in a healthy bump in horsepower and torque across the entire RPM range with the...

APR'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...

APR'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 APR Supercharger Drive Pulley Installation Kit is designed to encapsulate the entire pulley and pull evenly across its entire surface. The unit is compact enough to not require complete removal of the front end of your vehicle, reducing labor time...

Replacement supercharger belt for use with an APR Drive Pulley & APR Crank Pulley. Fits Audi A6 Quattro 09-18, A7 Quattro 12-18, A8 Quattro 13-18, Q5 13-17, Q7 11-15, S4 10-16, S5 10-17, SQ5 14-17 Fits APR Drive Pulley and APR Crank Pulley High...

APR'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...