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Crankshaft Pulleys & Harmonic Balancers

Keep your drive belt system in check by replacing your BMW's crankshaft pulleys and harmonic balancers.
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Alta Performance - Corporate Logo
T#:394899
Part#: AMPENG500
In Stock
$ 129.99 USD
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$ 129.99 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#:26238480
Part#: AMPENG520
In Stock
$ 129.99 USD
Free Shipping on orders $49 and up

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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Dinan Underdrive Crankshaft Pulley Kit - E60 M5, E63/64 M6 S85 5.0L ...
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Dinan - Corporate Logo
T#:21078436
Part#: D560-0001
Ships in 5 Business Days
11% off MSRP $ 506.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 449.99 USD
Free Shipping on orders $49 and up
11% off MSRP
$ 506.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 449.99 USD
Free Shipping on orders $49 and up
Dinan's lightweight billet aluminum crankshaft pulley underdrives each of the accessories by 13 percent, reducing parasitic drag on the engine for a 6 HP @ 8000 RPM and 4 lb-ft torque @ 8000 RPM gain on a stock vehicle. The Dinan underdrive pulley retains the factory harmonic crankshaft damper, eliminating vibration that might otherwise damage the crankshaft. The kit includes all of the necessary mounting hardware, a lightweight pulley, and shorter belts. This product is backed by our industry-leading 4 year/50,000 mile warranty so you can rest assured that you are purchasing the best quality product for your BMW. Features: All accessories are underdriven by 13% to decrease drag on the engine. Lightweight billet aluminum crankshaft pulley, black anodized and engraved. Includes mounting hardware and shorter belts.
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Crank Pulley With Dampener
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Febi - Corporate Logo
T#:591627
Part#: 11237562801
In Stock
$ 97.71

This product was last offered at the strikethrough price on
05-11-2026

$ 68.99 USD
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$ 68.99 USD
Free Shipping

Smooth out rotational vibrations and maintain optimal engine performance with this pulley-driven unit for your Mini. Over time, wear and drying out can lead to unusual noises near the passenger's side oil pan, indicating the need for replacement. Ensure seamless operation by replacing this unit when necessary, and don't forget to change the hex bolts for comprehensive maintenance.

  • Reduces rotational vibrations for smoother engine operation
  • Prevents unusual noises near the passenger's side oil pan
  • Ensures optimal engine performance and longevity
  • Replacement recommended to maintain engine health
  • Hex bolts replacement advised for thorough maintenance
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Adjustment Pulley W11 1.6L Engine
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Ina - Corporate Logo
T#:591703
Part#: 11288625983
In Stock
$ 31.99

This product was last offered at the strikethrough price on
08-12-2026

$ 28.99 USD
Free Shipping on orders $49 and up
$ 28.99 USD
Free Shipping on orders $49 and up

Ensure your Mini's engine runs smoothly with the idler pulley, a crucial component in routing the serpentine belt. Discover the benefits below:

  • Smooth Belt Routing: Helps to effectively route the serpentine belt for optimal engine performance.
  • Prevents Rattles: Eliminates high-pitched rattles caused by worn-out bearings, ensuring a quieter driving experience.
  • Easy Installation: Simple bolt-on design requires no special tools, making installation hassle-free.
  • Enhanced Engine Performance: Maintains proper belt tension, preventing slippage and ensuring efficient power delivery.
  • Durable Construction: Crafted from high-quality materials for long-lasting durability and reliability.

Upgrade your Mini's engine with the idler pulley to maintain smooth belt operation and prevent unwanted noises.

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AFE - Corporate Logo
T#:372901
Part#: 79-10001
Ships in 3 Business Days
20% off MSRP $ 585.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 468.00 USD
Free Shipping on orders $49 and up
20% off MSRP
$ 585.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 468.00 USD
Free Shipping on orders $49 and up
aFe Power's new power pulley brings performance engineering to your BMW M3. This power pulley is a complete bolt-on kit, including the pulley, bolts, and belts. aFe's power pulleys are CNC machined out of billet aluminum and black anodized for that aggressive look under the M3's hood. This power pulley does not modify factory harmonics or dampening. In recent Dyno testing this power pulley produced 10 HP and 7lbs. x ft. torque. aFe's power pulley fits up to production date May 2008. When it comes to engineering for power, performance, protection and value, aFe Power is the only choice.
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Febi - Corporate Logo
T#:56616373
Part#: 11238602800SK
Special Order: No Guaranteed ETA
New Item
$ 146.99 USD
Free Shipping on orders $49 and up
Protect your engine's bottom end against destructive torsional harmonics with the Febi Bilstein Harmonic Crankshaft Damper Pulley.
Febi - Corporate Logo
T#:38452839
Part#: 11237516385
Special Order: No Guaranteed ETA
$ 251.99 USD
Free Shipping on orders $49 and up
Every time the cylinders fire, torque is transferred into the crankshaft. The crankshaft deflects under this torque, which sets up vibrations when the torque is released. At certain engine speeds the torque imparted by the cylinders are in sync with the vibrations in the crankshaft, which results in a phenomenon called resonance This resonance causes stress beyond what the crankshaft can withstand, resulting in crankshaft failure. The accessory pulley acts as a balancer and prevents these vibrations from destroying your crankshaft.
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Febi - Corporate Logo
T#:56110333
Part#: 11238602800
Special Order: No Guaranteed ETA
New Item
$ 216.99 USD
Free Shipping on orders $49 and up
Maintain your BMW's smooth engine dynamics and accessory belt reliability with this OE-matching quality replacement crankshaft pulley from Febi Bilstein.

Febi - Corporate Logo
T#:55066632
Part#: 1004202
Special Order: No Guaranteed ETA
New Item
$ 154.99 USD
Free Shipping on orders $49 and up
This replacement crankshaft harmonic balancer from febi bilstein is designed to restore factory-level drivetrain refinement and protect your engine.