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

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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.
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Turner Motorsport Power Pulley Kit - E90/E92/E93 M3
Turner Motorsport Power Pulley Kit - E90/E92/E93 M3
10X Entries For Our Spin To Win Sweepstakes!
Turner Motorsport - Corporate Logo
T#:338810
Part#: TMS1805
In Stock
Sale - Save 30% $ 524.99
Starting at $ 367.49 USD
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Sale - Save 30% $ 524.99
Starting at $ 367.49 USD
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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.
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Turner Motorsport Power Pulley Kit - E9X M3 S65
Turner Motorsport Power Pulley Kit - E9X M3 S65
For vehicles with production date up to 04/2008
10X Entries For Our Spin To Win Sweepstakes! Adds up to 10-14hp and 7-9ft/lbs torque on a stock M3 ¦ For vehicles with production date up to 04/200
Turner Motorsport - Corporate Logo
T#:395356
Part#: PPK-S65-EKT
In Stock
Sale - Save 35% $ 524.99
$ 341.24 USD
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Sale - Save 35% $ 524.99
$ 341.24 USD
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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.
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Vargas "Spline Lock" Crank Hub Solution - Includes Crank Bolt Capture - N55, S55
Vargas "Spline Lock" Crank Hub Solution - Includes Crank Bo...
Vargas Turbo Technologies - Corporate Logo
T#:558795
Part#: VTT-CRANKHUB-1
In Stock
$ 879.99 USD
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$ 879.99 USD
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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.
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MMR Crank Hub Kit - N55/S55
MMR Crank Hub Kit - N55/S55
MMX Performance - Corporate Logo
T#:4565824
Part#: MMR20-1003FK
In Stock
$ 809.99 USD
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$ 809.99 USD
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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.
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Active Autowerke Power Pulley Kit - E9x M3
Active Autowerke Power Pulley Kit - E9x M3
Active Autowerke - Corporate Logo
T#:397285
Part#: 13-001
In Stock
$ 312.99
$ 287.99 USD
Limited Qty Sale
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$ 312.99
$ 287.99 USD
Limited Qty Sale
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Easy to install - reduces parasitic losses from belt driven auxiliary components. Engine crankshaft pulley remains the same, this modification simply unleashes untapped potential from your vehicle. Expect to see gains around 10 RWHP from your S65. All BMW power pulleys included, including alternator, water pump, and power steering pulleys.
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Rogue Engineering Power Pulley Set - E9X M3 (05/2008+)
Rogue Engineering Power Pulley Set - E9X M3 (05/2008+)
Rogue Engineering - Corporate Logo
T#:553839
Part#: PP.S65.V8.B
Ships in 9 Business Days
$ 295.00 USD
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$ 295.00 USD
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Rogue Engineering has developed a power pulley kit that reduces the drag on specific pulleys while allowing others to remain at their same efficiency. This allows for perfect operation in daily driven vehicles without a hiccup or stutter. However, when the demand for power is requested, the power pulley kit allows for the freed power to become apparent. The term "power" pulley is a bit of a misnomer. Underdrive pulleys actually free up power by reducing the drag caused by the accessories. These pulleys are based off a calculated percentage from factory dimensions, so that particular component speeds are safely reduced without affecting their true purpose.
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Rogue Engineering Power Pulley Set - E9X M3 (up to 05/2008)
Rogue Engineering Power Pulley Set - E9X M3 (up to 05/2008)
For vehicles with a production date up to 05/2008 with single drive belt.
Rogue Engineering - Corporate Logo
T#:553840
Part#: PP.S65.V8.A
Ships in 4 Business Days
$ 295.00 USD
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$ 295.00 USD
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Rogue Engineering has developed a power pulley kit that reduces the drag on specific pulleys while allowing others to remain at their same efficiency. This allows for perfect operation in daily driven vehicles without a hiccup or stutter. However, when the demand for power is requested, the power pulley kit allows for the freed power to become apparent. The term "power" pulley is a bit of a misnomer. Underdrive pulleys actually free up power by reducing the drag caused by the accessories. These pulleys are based off a calculated percentage from factory dimensions, so that particular component speeds are safely reduced without affecting their true purpose.
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N54 VAC Harmonic SuperDamper By ATI
N54 VAC Harmonic SuperDamper By ATI
ATI Performance Products - Corporate Logo
T#:639879
Part#: VAC-HPCD-N54
Ships Jul 10, 2025
$ 1,012.99 USD
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$ 1,012.99 USD
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If you are breaking crankshafts and oil pumps, the cause may be a mystery to you as it has been to many of our customers. We know that controlling the harmonic resonance of the BMW 6 is highly important as RPMs rise, but the ideal configuration of the inline-6 motor makes even experienced engine builders overlook some fundamental principals of engine harmonics that can be destructive. ATI Performance Products has partnered with VAC Motorsports to develop new dampers for BMW 2.5L, 2.8L, 3.0L and 3.2L straight-6 engines found in the E36 and E46 M3, E9X and E6X, as well as newer Z3s and Z4s. These dampers eliminate crankshaft harmonic vibration, which allows the engine to produce more horsepower and torque, while also reducing internal engine wear at the same time. Broken oil pumps and timing chains will be a thing of the past! When used with a VAC accessory pulley, these dampers are a direct replacement over the OEM balancer. They have a 7” outer diameter and include OEM style timing alignment tabs. BMW enthusiasts should know that all ATI Super Dampers exceed SFI 18.1 Safety Certification and are approved for competition. The advantages of the ATI SuperDamper include eliminating vibration issues with inline 6 engines equipped with lightweight clutch and flywheel assemblies, reduced bearing, engine accessories, oil pump wear, and compatibility with underdrive pulleys. Includes lightweight VAC Billet Crankshaft Pulley. Made in the USA.
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