Turner Motorsport Power Pulley Kit - E36 325/M3, E34 525i (M50)

Underdrive Power Pulleys work to 'free up' horsepower. Any accessory that spins from the main drive belt is using up power. That's power that could otherwise be used to move the car. By giving some of that power back to the engine, you can make the car faster!

Additional Info
Click here for example dyno graph

Click here for installation instructions.

Fits these cars: