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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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ARP Harmonic Damper Bolt Set - BMW S58

T#:49092362

Part#: ARP-CBS-S58

Ships in 3 Business Days

$ 134.99 USD

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$ 134.99 USD

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The OE crank bolts are grade 10 torque-to-yield bolts, designed for only a single use. For vehicles making stock power, the stock bolts are more than enough. Unfortunately, vehicles making more power than stock have experienced issues with the stock damper bolts coming loose and breaking, leading to engine and crank damage. 5150 AutoSport worked with ARP to create this ARP Harmonic Damper Bolt Set to address this issue. These upgraded bolts are stronger than the factory bolts and are designed to provide even repeatable torque load, preventing them from breaking and allowing them to be re-torqued as needed.

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Dinan Underdrive Crankshaft Pulley Kit - E60 M5, E63/64 M6 S85 5.0L ...

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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

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

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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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Crankshaft Pulleys & Harmonic Balancers

ARP Harmonic Damper Bolt Set - BMW S58

Dinan Underdrive Crankshaft Pulley Kit - E60 M5, E63/64 M6 S85 5.0L ...

M7 Lightweight Crank Pulley - Stock Size

Adjustment Pulley W11 1.6L Engine

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