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BMW Engine Parts

Turner Motorsport has everything you need to upgrade your BMW through our stages of performance or to keep your car in peak condition with our range of the latest in proven OEM cooling parts. Upgrade your cooling system and engine performance with the selections below to give your BMW a performance and reliability advantage.

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OMP - Corporate Logo
T#:1614
Part#: EA-462
In Stock
$ 65.00 USD
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$ 65.00 USD
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OMP Battery Cut Off Switch / Kill Switch, for use in racecars as an emergency "kill switch", to depower the electrical system in the event of a crash or other emergency. This cut off switch is FIA approved, has 6 poles and alternator protection, as well as a removable key.
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Alta Performance - Corporate Logo
T#:26238480
Part#: AMPENG520
In Stock at Vendor
Sale - Save 11% $ 129.99

This product was last offered at the strikethrough price on
07-17-2026

$ 116.28 USD
Free Shipping on orders $49 and up
Sale - Save 11%
$ 129.99

This product was last offered at the strikethrough price on
07-17-2026

$ 116.28 USD
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Enhance the performance of your Mini with the ALTA Lightened Crank Pulley (LCP), engineered to increase horsepower and torque. Available in 0% Stock Sized and +2% Oversized options, this pulley is crafted from 6061T6 aluminum, weighing only 0.65 lbs. Significantly lighter than the stock crank pulley, the ALTA LCP ensures improved engine efficiency without adding vibration or noise. The +2% Oversized pulley provides additional boost for Supercharged Cooper S models, delivering safe and reliable performance. With increased belt contact, this pulley reduces wear and enhances durability, making it a must-have upgrade for Mini enthusiasts.

  • Increases horsepower and torque
  • Lightweight 6061T6 aluminum construction
  • Available in 0% Stock Sized and +2% Oversized options
  • Does not affect charging system
  • Improves engine efficiency and performance
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Alta Performance - Corporate Logo
T#:394899
Part#: AMPENG500
In Stock at Vendor
Sale - Save 11% $ 129.99

This product was last offered at the strikethrough price on
07-17-2026

$ 116.28 USD
Free Shipping
Sale - Save 11%
$ 129.99

This product was last offered at the strikethrough price on
07-17-2026

$ 116.28 USD
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ALTA Lightweight Crank Pulley (LCP) for Mini

Upgrade your Mini's performance with the ALTA Lightweight Crank Pulley (LCP), designed to increase horsepower and torque. Available in two sizes - 0% Stock Sized and +2% Oversized - this pulley is engineered for Supercharged Cooper S models. Crafted from 6061T6 aluminum, the ALTA pulley is lightweight, weighing just 0.65 lbs, providing a weight reduction of over 2.3 lbs compared to the stock crank pulley.

  • Increases horsepower and torque
  • Lightweight design reduces rotational mass
  • Does not wear out engine bearings or oil pump
  • Adds boost safely and reliably
  • Improves belt contact with pulleys, reducing wear
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Alta Performance - Corporate Logo
T#:15777319
Part#: AMPENG200V2
Ships in 5 Business Days
Sale - Save 11% $ 123.99

This product was last offered at the strikethrough price on
07-17-2026

$ 110.92 USD
Free Shipping on orders $49 and up
Sale - Save 11%
$ 123.99

This product was last offered at the strikethrough price on
07-17-2026

$ 110.92 USD
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Enhance your Mini's performance with the ALTA Supercharger Pulley, crafted from lightweight 6061T6 aluminum. This pulley reduces the rotational inertia of the supercharger, significantly enhancing engine responsiveness. Featuring cross-drilled holes over each groove, it improves belt grip and minimizes belt slippage as the belt stretches. Additionally, oversized belt retainers prevent belt jumping.

ALTA offers two reduction sizes: 15% and 17%, each providing distinct benefits.

  • 15% Reduction: The standard choice in the market, delivering smooth power increases of approximately 20WHP for safe performance enhancements.
  • 17% Reduction: Ideal for those seeking more power, this option builds boost at lower RPMs, providing additional power where needed. It delivers an extra 1.5psi of boost at redline, ensuring added horsepower to conquer challenging situations.
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Alta Performance - Corporate Logo
T#:586220
Part#: AMPENG208
In Stock at Vendor
Sale - Save 10% $ 93.99

This product was last offered at the strikethrough price on
07-17-2026

$ 84.15 USD
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Sale - Save 10%
$ 93.99

This product was last offered at the strikethrough price on
07-17-2026

$ 84.15 USD
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Crafted from machined 6061 billet aluminum, the ALTA Performance Pulley Removal Tool is specifically designed for the non-JCW MINI Cooper S, offering a convenient way to enhance power quickly and effortlessly, whether you're in a workshop or your backyard. This versatile tool ensures durability and can be utilized repeatedly with proper usage, maintenance, and care. An essential addition for MINI specialty shops, this tool is compatible with all OEM-sized pulleys, except for JCW variants. Note: A steering wheel puller is necessary for the removal of the stock supercharger pulley.

  • Crafted from machined 6061 billet aluminum
  • Designed for non-JCW MINI Cooper S
  • Durable for repeated use with proper care
  • Ideal for MINI specialty shops
  • Compatible with all OEM-sized pulleys (excluding JCW)
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Alta Performance - Corporate Logo
T#:586157
Part#: AMPENG205V2
In Stock
Sale - Save 11% $ 123.99

This product was last offered at the strikethrough price on
07-17-2026

$ 110.92 USD
Free Shipping
Sale - Save 11%
$ 123.99

This product was last offered at the strikethrough price on
07-17-2026

$ 110.92 USD
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Crafted from lightweight 6061T6 aluminum, the ALTA SC pulley body reduces the supercharger's rotational inertia, significantly enhancing your Mini's engine responsiveness. This innovative pulley design integrates cross-drilled holes to amplify belt grip and mitigate belt slippage, especially during belt stretching. Furthermore, it incorporates oversized belt retainers to prevent belts from jumping off. Available in two sizes—15% and 17% reductions—the 15% reduction option, a market standard, delivers safe power gains of around 20WHP, ensuring a smoother and enhanced performance.

Benefits:

  • Enhanced engine responsiveness
  • Improved belt grip and reduced slippage
  • Safe power increase of around 20WHP (15% reduction)
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Alta Performance - Corporate Logo
T#:27938418
Part#: AMPENG195BK
In Stock at Vendor
Sale - Save 10% $ 99.99

This product was last offered at the strikethrough price on
07-17-2026

$ 89.51 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 99.99

This product was last offered at the strikethrough price on
07-17-2026

$ 89.51 USD
Free Shipping on orders $49 and up

MINI R52 R53 Adjustable Tensioner Stop - Black

Upgrade your Mini's engine with the MINI R52 R53 Adjustable Tensioner Stop - Black. Engineered for precision and durability, this tensioner stop allows for easy adjustment of belt tension, ensuring optimal performance. Say goodbye to belt slippage and enjoy improved engine reliability with this high-quality accessory.

  • Allows for easy adjustment of belt tension
  • Prevents belt slippage for improved engine reliability
  • Engineered for precision and durability
  • Enhances performance of your Mini's engine
  • Sleek black design adds a stylish touch
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Alta Performance - Corporate Logo
T#:586195
Part#: AMPENG213
In Stock
Sale - Save 10% $ 32.00

This product was last offered at the strikethrough price on
07-17-2026

$ 28.80 USD
Free Shipping on orders $49 and up
Sale - Save 10%
$ 32.00

This product was last offered at the strikethrough price on
07-17-2026

$ 28.80 USD
Free Shipping on orders $49 and up

Upgrade your Mini's supercharger with the Supercharger Pulley Belt from Alta Performance. Specifically designed for the R52 R53 W11 1.6L Engine and compatible with Alta 15% and 17% pulleys (part number 60535), this belt ensures optimal performance. Don't let a worn-out belt cause annoying squeaks under the hood – replace it every 30,000 miles and keep your Mini running smoothly.

  • Designed for R52 R53 W11 1.6L Engine
  • Compatible with Alta 15% and 17% pulleys
  • Connects main pulley to alternator, water pump, and air conditioner pump pulley
  • Replace every 30,000 miles to maintain optimal performance
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Genuine BMW Motorsport - Corporate Logo
T#:396369
Part#: 12311311449KT
Ships on Aug 24, 2026
$ 1,696.99 USD
Free Shipping on orders $49 and up

Group A racecars were the top of their class in both touring car and rally racing. Heavily modified and extremely fast these cars set out to demonstrate the best of what a manufacturer could do on the racetrack. It was the predecessor to the current DTM class racing and set a standard for many other divisions of motorsport to follow.  

One of the weaker points of the S14 engine, when speaking from a racing standpoint is the belt drive system. While fine for a street going car, a V-belt is not suitable for high RPM applications. On the track, most of your time will be spent in the higher rev range which puts extreme amounts of stress on the factory setup. BMW realised this and came up with a solution that involved doing away with the V belt system and using a 6 rib serpentine style instead.

Extremely resistant to slippage and failure this design holds up much better the abuse of track duty and won't leave you stranded and waiting for tow back to the pit. Additionally, this kit does not accommodate and a/c compressor and the alternator and waterpump are underdriven by way of slightly larger pulleys. Combined, this puts less of a load on the crankshaft which leads to more efficient power delivery to the ground. If you track you E30 M3, this is an essential upgrade and until now was extremely difficult to source. Do not skip this pivotal step in your engine build or overhaul and get a leg up on the competition the Group A way.
Please note this kit is special order and in non-returnable

Features:

  • Kit replaces all engine pulleys and crank damper
  • Includes 6 rib serpentine belt
  • Underdriven waterpump and alternator pulleys
  • Recommended for off road and racing use only 

This kit fits the following BMWs:
1986-1992 BMW M3 All 
 

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