Power Pulley Kit for 2007-12 BMW M3 [E90/E92/E93] Underdrive Pulleys by Active Autowerke (13-001)

This complete bolt-on Active Autowerke Signature Pulley Kit for the E90, E92, or E93 M3 produces dyno proven gains of 10 wheel horsepower. For a high quality product it is constructed from billet 6061 anodized aluminum. This pulley is not only designed to produce power, but also retain the inherent qualities of your vehicle without sacrificing reliability.

This performance upgrade is easy to install and is fully reversible. Please verify if your E9X M3's air conditioning belt is single or double sided before ordering.

How to tell if you have a double or single sided belt:

• Take a look at the water pump belt, you will see that the belt is smooth on one side and has multiple grooves on the flip side. This is referred to as a SINGLE side belt.

• The air conditioning belt, if it looks and feels similar to the belt that drives the water pump then it is single sided.

• If the air conditioning belt has multiple groves on both sides then you have a dual sided belt. Production models should be from 6/2008 up.