Power Pulleys

VAC Motorsports ATI A/C Pulley - BMW M50 M52 M52TU M54 S50 S52 ...

T#:8076765

Part#: VAC-HPCD-M50-ACP

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$ 149.99 USD

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$ 149.99 USD

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If you are planning on keeping your Air Conditioning system in your street or track car, then you will need to combine VAC's ATI AC Pulley with the ATI Harmonic Damper.

MMX Crank Hub Capture Plate - Black - S55

T#:4552069

Part#: MMR20-1002

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$ 187.99 USD

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$ 187.99 USD

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Anyone with a modified 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 S55 crank hub likes to spin, without warning and even when the engine is in perfect health. MMR has produced a 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. This capture plate can be secured to the OEM crank bolt or to MMR's redesigned one-piece crank hub. *Installation recommended by a professional shop or technician.

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MMR One-Piece Crank Hub - S55

T#:4565823

Part#: MMR20-1001

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$ 730.99 USD

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$ 730.99 USD

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Anyone with a modified 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 S55 crank hub likes to spin, without warning and even when the engine is in perfect health. MMX 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! Can also be paired with MMR's Performance Capture Plate to ensure against loosening of the crank bolt. *Installation recommended by a professional shop or technician.

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MMR Crank Hub Kit - N55/S55

T#:4565824

Part#: MMR20-1003FK

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$ 849.99

This product was last offered at the strikethrough price on
07-14-2026

$ 849.65 USD

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$ 849.65 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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VAC Motorsports Lightweight Underdrive Power Pulley Set - S54 ...

T#:27705420

Part#: VACUPPSS542ULG

Ships on Aug 6, 2026

$ 294.99 USD

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$ 294.99 USD

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Crafted from high-grade domestic USA 6061-T6 Billet Aluminum, these pulleys are a testament to precision engineering. Rigorously tested through extensive hours of racing and street use, they've proven their reliability and performance excellence.

Each pulley is meticulously zero-balanced and thoroughly inspected to ensure zero-runout, guaranteeing optimal performance without compromising on reliability, noise, or vibration.

This comprehensive kit comprises a precision power steering pulley, water pump pulley, and an OE Contitech Brand drive belt. Experience a notable boost of 8hp and 7 ft/lbs. of torque to the wheels, making it ideal for stock vehicles, track cars, and even those with upgraded audio systems seeking consistent voltage output from their alternators.

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VAC M62 Underdrive Power Pulley Set (09/1998+)

T#:928436

Part#: VAC-UPPS-M62-99

Ships in 9 Business Days

$ 329.99 USD

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$ 329.99 USD

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VAC Underdrive Power Pulley Sets for the M60 release 8.5 horsepower @ 5800 RPM and 8 lb/ft of torque @ 4500 RPM (measured @ the wheels.) Always made using only virgin billet 6061 T6 aluminum, an anodized finish, and the tightest tolerances; VAC's pulleys are used on some of the fastest BMWs on the planet. A lightweight design optimizes performance and response while under-driving components just the right amount for proper function at all RPMs.

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VAC Underdrive Power Pulley Set - S14

T#:598754

Part#: VAC-UPPS-S14-3-G

Ships on Aug 6, 2026

$ 334.99 USD

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$ 334.99 USD

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Made using only virgin billet aluminum, a hard anodized finish, and the tightest tolerances, VAC's pulley sets are used on some of the fastest S14s on the planet. This lightweight design optimizes performance and response while under-driving components just the right amount for proper function. Perfect for track cars, they can also be used on a street car without any problems. Features: Reduces pump cavitation at higher rpm's Saves weight when every bit counts Includes new, correct length, labeled Contitech belts for WP, ALT, P/S

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VAC Motorsports S54 Underdrive Power Pulley Set - 3 Pulley Race Set -...

T#:29533361

Part#: VACUPPSS543ULG

Ships on Aug 6, 2026

$ 349.99 USD

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$ 349.99 USD

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These pulleys are precision made from domestic USA 6061-T6 Billet Aluminum. They have undergone thousands of hours in testing, race use, and street miles accumulated to show these pulleys work great and give you the edge. Each is precision zero-balanced and inspected for zero-runout for the best performance and to have no adverse effects on reliability, noise, or vibration. This 3 Pulley Race Set is a very popular choice: just like the 2 pulley set, a precision power steering pulley and water pump pulley are included, but VAC includes an additional underdriven alternator pulley for maximum power output on the track. We have seen 11hp and 9 ftlbs to the wheels on otherwise stock racing cars with this kit.

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VAC Motorsports ATI A/C Pulley - BMW M50 M52 M52TU M54 S50 S52 ...

MMX Crank Hub Capture Plate - Black - S55

MMR One-Piece Crank Hub - S55

MMR Crank Hub Kit - N55/S55

VAC Motorsports Lightweight Underdrive Power Pulley Set - S54 ...

VAC M62 Underdrive Power Pulley Set (09/1998+)

VAC Underdrive Power Pulley Set - S14

VAC Motorsports S54 Underdrive Power Pulley Set - 3 Pulley Race Set -...

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