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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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Dinan Underdrive Crankshaft Pulley Kit - E60 M5, E63/64 M6 S85 5.0L
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
Sale - Save 10% $ 449.99

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

$ 404.96 USD
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Sale - Save 10%
$ 449.99

This product was last offered at the strikethrough price on
07-31-2026

$ 404.96 USD
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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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M7 Lightweight Crank Pulley - Stock Size
M7 Lightweight Crank Pulley - Stock Size
M7 Speed - Corporate Logo
T#:12774050
Part#: 53-3M7101-0
In Stock
$ 159.99 USD
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$ 159.99 USD
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Adjustment Pulley W11 1.6L Engine
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
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$ 28.99 USD
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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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