E9X M3 Dinan Underdrive Pulley Kit

Product Details

This underdrive crankshaft pulley frees up horsepower and torque by slowing down the engine-mounted accessories. Your stock pulley/belt setup is designed to work more than it needs. Accessories such as the water pump, power steering pump, and alternator are working more than they need to. By backing down the work they do you can restore that lost horsepower and still maintain safe operating levels of each. This underdrive pulley has been carefully engineered to make more horsepower and still leave you with a safe buffer. Dinan has performed extensive testing to ensure cooling and charging systems remain fully functional, even in extreme heat. The underdrive pulley on the S65 releases 11hp and 7ft-lbs of torque back into the engine.

For over 35 years, Dinan has been America’s premier tuning company, pioneering advancements in BMW modification using their “total package” approach that focuses on balanced performance while preserving the original character and driving feel that a BMW offers. When you install a Dinan part on your car, know that it’s not only carefully developed and tested, but that Dinan stands behind it with a four year, 50,000-mile warranty.

BMW changed the pulley and belt design midway through 2008. Select your appropriate production date from the options below.

This item fits the following BMWs:
2008-2013 E90 E92 E93 BMW M3 Sedan, Coupe, Convertible