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 Underdrive Power Pulleys

 Description:  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.

We offer Underdrive Power Pulleys for the following BMWs (click to change)

 E36 Underdrive Power Pulleys E46 Underdrive Power Pulleys E90 Underdrive Power Pulleys E92 Underdrive Power Pulleys E34 Underdrive Power Pulleys E39 Underdrive Power Pulleys E60 Underdrive Power Pulleys E63 Underdrive Power Pulleys Z3 Underdrive Power Pulleys Z4 Underdrive Power Pulleys E53 Underdrive Power Pulleys
APPLICATIONS YEAR   DESCRIPTION PRICE BUY

larger 		E36, E34, MZ3(S52) Power Pulley Kit
 323/325/328/M3, 525, M Coupe/Roadster (E36 E34 MZ3) 		1992-2000 Power Pulley Kit for E36 325i (1992-1995, E36 323i/328i 1996-1999, E36 M3 1995-1999, E34 525i (1991-1995 w/o servotronic steering), M Coupe/Roadster (1998-2000 with S52 engine)

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, power steering pump and alternator*. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley due to the potential harm to the crankshaft. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump, power steering, alternator pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7 hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

*Alternator pulleys - we offer two kits, one for the performance minded individual and one for the serious audiophile. If you have a significant additional load on the alternator, from aftermarket audio amplifiers, you will not want to underdrive the alternator. Thus, we simply lighten that pulley rather then underdrive it. Choose from the menu below if you have a stock or an upgraded stereo.

For all kits we now ship both BOSCH and VALEO alternator pulleys. We will charge you for both and we include a postage paid box to send the one back that you don't need. You will get a $64 refund once we get it back (final cost after refund is the price below, in red.) If you know what type of alternator you have please indicate it in the Special Instructions field on your online order, otherwise we will send you both pulleys.

Click Here for E36 Dyno Chart

To learn more about TMS Pulleys, and installation click here.

Choose your car below.
Does your car have a stereo upgrade?
 		$249.00

larger 		E39 6cyl Power Pulley Kit
 525i/528i/530i (E39) 		1997-2004 Power Pulley Kit for E39 528i (1997-2000), and E39 525i & 530i (2001-2003)

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, power steering pump and alternator*. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley due to the potential harm to the crankshaft. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump, power steering, alternator pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

*Alternator pulleys - we offer two kits, one for the performance minded individual and one for the serious audiophile. If you have a significant additional load on the alternator, from aftermarket audio amplifiers, you will not want to underdrive the alternator. Thus, we simply lighten that pulley rather then underdrive it. Choose from the menu below if you have a stock or an upgraded stereo.

For all kits we now ship both BOSCH and VALEO alternator pullies! We will charge you for both and we include a postage paid box to send the one back that you don't need. You will get a $64 refund once we get it back (final cost after refund is the price below, in red.) If you know what type of alternator you have please indicate it in the Special Instructions field on your online order, otherwise we will send you both pullies

Click Here for Dyno Chart

To learn more about TMS Pulleys, click here.

Choose your car below.
Does your car have a stereo upgrade?
 		$249.00

larger 		E46 (not M3) Power Pulley Kit
 323i/325i/328i/330i (E46) 		1999-2005 Power Pulley Kit for E46 323i/328i 99-00, E46 325i, E46 330i

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, power steering pump and alternator*. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley due to the potential harm to the crankshaft. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump, power steering, alternator pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

*Alternator pulleys - we offer two kits, one for the performance minded individual and one for the serious audiophile. If you have a significant additional load on the alternator, from aftermarket audio amplifiers, you will not want to underdrive the alternator. Thus, we simply lighten that pulley rather then underdrive it. Choose from the menu below if you have a stock or an upgraded stereo. For all kits we now ship both BOSCH and VALEO alternator pullies! We will charge you for both and we include a postage paid box to send the one back that you don't need. You will get a $64 refund once we get it back (final cost after refund is the price below, in red.) If you know what type of alternator you have please indicate it in the Special Instructions field on your online order, otherwise we will send you both pullies.

Click Here for Dyno Chart

To learn more about TMS Pulleys, click here.

Choose your car below.
Does your car have a stereo upgrade?
 		$249.00

larger 		E46 M3 Power Pulley Upgrade Kit
 M3, M Coupe/Roadster (E46 MZ3) 		2001-2005 As used on our Project E46 M3 street car and our Grand Am Cup race car these are engineered not only to be the best pulley kits on the market, but to provide the best compromise between performance and reliability! Specifically, we have designed these "stock looking" pulleys to underdrive the water pump, power steering pump and alternator. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley on engines with harmonic balancers due to the potential harm to the crankshaft. As such our pulley kit for the E46 M3 does not replace the crank pulley, only the auxiliary pulleys. These kits provide 10%-20% overall reduction in driving your car's systems and have been dyno tested with a gain of 10hp on the E46 M3. Click Here For E46 M3 Dyno Chart.

Kit includes water pump, power steering, alternator pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 3 hours. New main drive belt included. Featured in European Car magazine! Fits E46 M3 and M Coupe/Roadster (with S54 engine).

To learn more about TMS Pulleys, and installation click here.

Does your car have stereo upgrade?
 		$299.95

larger 		E46 M3 Racing Pulley Set
 M3, S54 M Coupe/Roadster (E46 MZ3) 		2001-2006 TMS E46 M3 Racing Pulley is designed to achieve three goals: gain horsepower, reduce alternator and power steering pump wear, and lower power steering fluid temperatures. Due to constant high revolutions of the S54 power steering pump when on the track, we designed our racing power steering pulley to slow down the pump. This lowers fluid temperatures, resulting in less wear to the pump. This kit also includes a large alternator pulley, which also reduces wear. Kit uses our street water pump “under drive” pulley. All of these working together produce a significant gain of over 15 horsepower. The pulley has been track tested on our Grand Am Cup M3’s and dyno-tested. This is strictly for race/track cars only, due to the size of the alternator pulley the proper voltage cannot be maintained at low RPM.

Note: We sell pulleys separately incase you have special needs. Simply give us a call, or drop us an email.

Click here for Racing Alternator Pulley - TEN4622RM3
Click here for Racing Power Steering Pulley – TEN4623R03
 		$468.82

larger 		E46 M3 Racing Alternator Pulley
 M3, S54 M Coupe/Roadster (E46 MZ3) 		2001-2006 The TMS Racing Alternator Pulley (For VALEO alternators) is designed to unleash MAXIMUM Horsepower and reduce alternator wear. Our pulley has been track tested on our Grand Am Cup M3’s and dyno-tested for reliability. This pulley is strictly for race/track cars only, due to the size of the alternator pulley the proper voltage cannot be maintained at low RPM. We suggest installing with TMS Racing E46 M3 racing power steering pulley, P/N: TEN 46 23 R03 but this is not required.

Parts list for pulley:
  • Alternator Pulley
  • 10mm Bolt
  • 10mm Flat Washer
  • 10mm Wave Washer
When would it be a good time to perform this work on my car?
  • When replacing a drive belt.
  • Before a race weekend to help you get to the podium.
What main drive belt do I need to use with the TMS Racing Alternator Pulley?
  • If you have the standard pulley kit with the racing alternator pulley you will need a 6 groove, 1524mm long belt
  • If you have the full, TMS Racing pulley kit you will need a 6 groove, 1538mm long belt
(You must have one of the above kits to use this alternator pulley)
 		$149.92

larger 		E46 M3 Racing Power Steering Pulley
 M3, S54 M Coupe/Roadster (E46 MZ3) 		2001-2006 Don’t let power steering failure ruin your weekend and cost you a win! In the Grand Am Cup series, TMS has found that the power steering pump on the M3 S54 is prone to wear – potentially costing you a win or even a finish. The TMS Racing Power Steering Pulley is designed to achieve three goals: gain horsepower, reduce power steering pump wear, and lower power steering fluid temperatures. The pulley has been track tested on our Grand Am Cup M3’s and dyno-tested. This pulley is strictly for race/track cars only. We suggest installing with the TMS Racing E46 M3 Alternator pulley P/N: TEN 46 22 RM3

Parts list for kit
  • Racing Power Steering Pulley
When would it be a good time to perform this work on my car?
  • When replacing a drive belt.
  • When installing a new power steering pump
  • Before a race weekend to help you get to the podium.
What main drive belt do I need to use with the TMS Racing Power Steering Pulley?
  • If you have the standard pulley kit you will need a 6 groove, 1555mm long belt
  • If you have the full, TMS Racing pulley kit you will need a 6 groove, 1538mm long belt
 		$188.95

larger 		Turner Motorsport Power Pulley Kit for E53 X5 3.0 (M54)
 X5 3.0 (E53) 		2000-2006 Power Pulley Kit for E53 X5 3.0 (M54 engine)

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, power steering pump and alternator*. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley on engines with harmonic balancers due to the potential harm to the crankshaft. As such our pulley kit for the X5 3.0 does not replace the crank pulley, only the auxiliary pulleys. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump, power steering, alternator pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

*Alternator pulleys - we offer two kits, one for the performance minded individual and one for the serious audiophile. If you have a significant additional load on the alternator, from aftermarket audio amplifiers, you will not want to underdrive the alternator. Thus, we simply lighten that pulley rather then underdrive it. Choose from the menu below if you have a stock or an upgraded stereo.

For all kits we now ship both BOSCH and VALEO alternator pulleys! We will charge you for both and we include a postage paid box to send the one back that you don't need. You will get a $64 refund once we get it back (final cost after refund is the price below, in red.) If you know what type of alternator you have please indicate it in the Special Instructions field on your online order, otherwise we will send you both pullies.

Click Here for Dyno Chart

To learn more about TMS Pulleys, click here.

This Power Pully Kit Fits the Following BMWs:
All E53 X5 3.0, 3.0i SAV (M54 engine), including 2000, 2001, 2002, 2003, 2004, 2005, and 2006 models.
Does your car have a stereo upgrade?
 		$250.00

larger 		Power Pulley Kit for E60 M5 and E63/E64 M6 S85 V10
 M5 M6 (E60 E63 E64) 		2004-2009 Get MORE HORSEPOWER and TORQUE on your 2006 and newer M5 sedan or M6 coupe/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 M5 or M6'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.
FREE 2-DAY SHIPPING!
Limited time introductory offer: FREE UPS 2nd-DAY AIR shipping on all orders shipped within the 48 contiguous states shipping on this E9x M3 pulley kit.


CNC machined using aircraft grade 6061 aluminum billet, and anodized with a stealthy black coating. Others may advertise "their" crank pulley boasting higher numbers (using a smaller pulley profile), but we have concluded that for street and track driven M5 and M6, this is the best size and design to ensure proper engine temp and auxiliary functionality. As the S85 V10 engine doesn't use a traditional harmonic balancer, all factory harmonics and dampening are fully and properly retained. We've found this pulley alone adds 18 to 22 HP and 17 to 21 Ft/lbs Torque on a stock M5 or M6 with no other mods(!!).

The E60 M5 / E63 M6 Power Pulley Kit includes:
(1) Underdrive Crank Pulley
(1) Correctly Sized Drive Belt
(6) Allen Head Bolts
(1) Installation instructions

Fits the following BMWs:
2006+ E60 M5 sedan
2006+ E63/E64 M6 coupe & convertible

 		$399.95

larger 		E9x M3 Power Pulley Kit (All 2008+ E90/E92/E93 M3)
 M3 (E90 E92 E93) 		2008-2009 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.

CNC machined using aircraft grade 6061 aluminum billet, and anodized with a stealthy black coating. Others may advertise "their" crank pulley boasting higher numbers (using a smaller pulley profile), but we have concluded that for street and track driven M3s, this is the best size and design to ensure proper engine temp and auxiliary functionality. As the S65 M3 V8 engine doesn't use a traditional harmonic balancer, all factory harmonics and dampening are fully and properly retained. We've found this pulley alone adds 10 to 14 HP and 7 to 9 Ft/lbs Torque on a stock M3 with no other mods(!!).

FREE 2-DAY SHIPPING!
Limited time introductory offer: FREE UPS 2nd-DAY AIR shipping on all orders shipped within the 48 contiguous states shipping on this E9x M3 pulley kit.
The E9x M3 Power Pulley Kit includes:
(1) Underdrive Crank Pulley
(1) Correctly Sized Drive Belt
(6) Allen Head Bolts
(1) Installation instructions

Fits the following BMWs:
2008+ E90/E92/E93 M3 6 Speed Manual Transmission
2008+ E90/E92/E93 M3 DCT Double Clutch Transmission

Please select the year/transmission of your M3 (below) so that we may send you the proper parts for your application. There are specific kits for 2008 vs 2009+ model years, as well as manual transmission versus DCT sequential gearboxes. Choose below.

Select your M3
 		$399.95

larger 		Z3 (not M) TMS Power Pulley Upgrade Kit
 Z3 6cyl (Z3) 		1997-2002 Power Pulley Kit for Z3 2.8 (1997-2000), Z3 2.3 (1999-2000), Z3 2.5i (2001-2002) and Z3 3.0 (2001-2002)

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, power steering pump and alternator*. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley due to the potential harm to the crankshaft. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump, power steering, alternator pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

*Alternator pulleys - we offer two kits, one for the performance minded individual and one for the serious audiophile. If you have a significant additional load on the alternator, from aftermarket audio amplifiers, you will not want to underdrive the alternator. Thus, we simply lighten that pulley rather then underdrive it. Choose from the menu below if you have a stock or an upgraded stereo.

For all kits we now ship both BOSCH and VALEO alternator pullies! We will charge you for both and we include a postage paid box to send the one back that you don't need. You will get a $64 refund once we get it back (final cost after refund is the price below, in red.) If you know what type of alternator you have please indicate it in the Special Instructions field on your online order, otherwise we will send you both pullies

Click Here for Dyno Chart

To learn more about TMS Pulleys, click here.

Were you looking for M Roadster or M Coupe Pulleys?
 (click here for the 1998-2000 M Coupe/Roadster kit)
(click here for the 2001-2002 S54 M Coupe/Roadster kit)

Choose your car below.
Does your car have a stereo upgrade?
 		$249.00

larger 		Z4 2.5/3.0 TMS Power Pulley Upgrade Kit
 Z4 2.5/3.0 (Z4) 		2003-2005 Power Pulley Kit for Z4 2.5/3.0 2003-2005

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, and the alternator*. The Z4 has electric power steering and therefore does not need a third pulley. Adding these is like getting FREE HORSEPOWER - there are no downsides and underdriving each of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley due to the potential harm to the crankshaft. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump, alternator pulleys, and belt. The Z4 has electric power steering and therefore does not need a third pulley. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

Click Here for Dyno Chart

To learn more about TMS Pulleys, click here.
 		$172.00

larger 		MZ4 Power Pulley Upgrade Kit (Z4 M Roadster & Coupe)
 Z4 M Roadster & Coupe (Z4 MZ4) 		2003-- Power Pulley Kit for Z4 M Roadster & Coupe, 2004 and on.

As used on our racecars and street cars, these are engineered not only to be the best pulley kits on the market but also to provide the best compromise between performance and reliability. Specifically, we have designed them to underdrive the water pump, and power steering pump. Adding these is like getting FREE HORSEPOWER. There are no downsides and underdriving both of these accessories has been proven safe through years of on and off-track use. We do not believe it is safe to change the crankshaft pulley due to the potential harm to the crankshaft. These kits provide a 10%-20% overall reduction in driving your car's systems and have been dyno-tested with a gain of up to 11hp.

Kit includes water pump and power steering pulleys and belt. The T-6061 hard anodized aluminum pulleys account for a 10 to 20-percent decrease in accessory speeds, reducing the load on the engine but still maintaining a safe margin for reliability on all components. Installation involves removing the fan for easy access to the front of the engine. The main drive belt comes off easy and each pulley is mounted with Allen head bolts. Typical installation time is 1.5 hours. New main drive belt is included. The pulleys were good for 10.7hp at 6960 rpm and 8.1 lb-ft of torque at 5550 on the 1995 M3.

Click Here for Dyno Chart

To learn more about TMS Pulleys, click here.
 		$229.90

 

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