Home
Engine Parts
Underdrive Power Pulleys

BMW Underdrive Power Pulleys for BMW 3 Series E93 (2007-2013)

Reduce parasitic loss of power on your BMW's engine by safely under driving the belt driven auxiliary systems. Reducing this drag on your engine results in MORE HORSEPOWER AND TORQUE to the wheels of your BMW. Our BMW underdrive power pulley kits are specifically designed for each BMW application to make the best power while maintaining stock driveability and reliability, eliminating potential downsides. Others may advertise "their" pulleys boasting more power, but we concluded that for street and track driven BMWs, ours are the best size and design to ensure both your engine and it's belt-driven systems (alternator, water pump, power steering etc) are well within safe operation. We run these under drive pulleys on our own BMWs, so we would not want them any other way.

Sort By:

Turner Motorsport Power Pulley Kit - E90/E92/E93 M3

10X Entries Into Our F80 M3 Sweepstakes

T#:338810

Part#: TMS1805

Ships in 1 Business Day

Sale - Save 27% $ 546.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 401.99 USD

Add to Wish List

Sale - Save 27%

$ 546.99

This product was last offered at the strikethrough price on
06-13-2026

Starting at $ 401.99 USD

Add to Wish List

Get MORE HORSEPOWER and TORQUE on your 2008, 2009 and newer M3 coupe, sedan or convertible by replacing the stock crank pulley with this specially designed performance version. The Power Pulley reduces rotational mass and safely under drives your belt driven auxiliaries for reduced parasitic power loss. The end result: More power to your M3's rear wheels! Designed to give the best performance benefit with no sacrifices or compromises to your BMW's reliability. These have been tested on hundreds of cars before public release and there are simply NO DOWNSIDES to this upgrade.

Show More Show Less

Turner Motorsport Power Pulley Kit - E9X M3 S65

For vehicles with production date up to 05/2008 & a closckwise rotating Power Steering ...

10X Entries Into Our F80 M3 Sweepstakes
Adds up to 10-14hp and 7-9ft/lbs torque on a stock M3 | For vehicles with production date up to 04/200

T#:395356

Part#: PPK-S65-EKT

Ships in 1 Business Day

Sale - Save 25% $ 535.99

This product was last offered at the strikethrough price on
06-14-2026

$ 401.99 USD

Add to Wish List

Qty

Sale - Save 25%

$ 535.99

This product was last offered at the strikethrough price on
06-14-2026

$ 401.99 USD

Add to Wish List

The idea of power pulleys is simple. The less effort the engine puts into running accessories such as the water pump, power steering, pump alternator etc., the more of that power can be used elsewhere - your wheels! The way this is done by reducing the rotation of the pulleys by as much as 10-20%! The end result is more horsepower at your disposal. Turner has done extensive testing (on and off the track), to ensure that the accessory systems still function as intended and without failure. These pulleys offer an excellent compromise of power gains, reliability, and performance.

Show More Show Less

Vargas "Spline Lock" Crank Hub Solution - Includes Crank Bolt Capture...

2X Entries Into Our F80 M3 Sweepstakes

T#:558795

Part#: VTT-CRANKHUB-1

Ships in 1-2 days

$ 889.99 USD

Add to Wish List

Qty

$ 889.99 USD

Add to Wish List

Under certain conditions, the N55 crank hub likes to spin, without warning and even when the engine is in perfect health. The engineers at Vargas saw and dealt with this problem time and again, and they saw fit to do something about it. This hub uses a proprietary "Spline Lock" technology that uses high tolerance machined splines which press into the crank, and positively lock the hub to the crank. The splines are machined in such a way that rotational forces drive the hub, and splines deeper into the crank meaning when the hub encounters a situation that would normally slip a stock hub the splined hub is driven into the crank to keep it in place (much like a splined extractor). Features: Installs the same as a stock hub Does NOT require the crank to be drilled for pins Manufactured from Harndered 17-4SS We suggest the Crank Hub System ONLY be installed by a qualified shop or technician. Timing tools are 100% REQUIRED if installed improperly engine damage may occur. DISCLAIMER: VTT and ECS are not responsible for any engine damage caused by improper installation, or misuse of the crank hub solution.

Show More Show Less

MMR Crank Hub Kit - N55/S55

T#:4565824

Part#: MMR20-1003FK

Ships in 2 Business Days

$ 849.99 USD

Add to Wish List

Qty

$ 849.99 USD

Add to Wish List

Anyone with a modified N55/S55 knows the risks involved with the OEM Crank Hub. When the engine simply can't handle the stresses its put under or the design is such that it simply does not support extreme conditions, issues can arise. Under certain conditions, the N55/S55 crank hub likes to spin, without warning and even when the engine is in perfect health. MMR has produced a EN36 machined billet one-piece crank hub heat treated with a 0.75mm case hardening which makes it extremely durable. Due to the one-piece design, it ensures that the friction plates cannot slip. This offers a huge jump in reliability when paired with a new properly torques crank bolt. Installation is requires no drilling or modification to the OEM crankshaft ensuring a perfect fit! Included in this kit is MMR's T-6061 machined billet aluminum capture plate anodized in their trademark finish. The MMR Performance capture plate secures the head of the OE crank bolt and prevents it from turning or being able to loosen. *Installation recommended by a professional shop or technician.

Project Cars

SELECT YOUR BMW

BMW Underdrive Power Pulleys for BMW 3 Series E93 (2007-2013)

Turner Motorsport Power Pulley Kit - E90/E92/E93 M3

Turner Motorsport Power Pulley Kit - E9X M3 S65

Vargas "Spline Lock" Crank Hub Solution - Includes Crank Bolt Capture...

MMR Crank Hub Kit - N55/S55

Select Vehicle

Category

Brand

Price

Special Offers

Narrow Results