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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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ATI Super Damper / Harmonic Balancer - Stock Size - BMW B58A (Gen1), B58C B58D (Gen2/TU) 3.0L
ATI Super Damper / Harmonic Balancer - Stock Size - BMW B58A (Gen1), ...
ATI - Corporate Logo
T#:43142742
Part#: 918573
In Stock at Vendor
$ 418.99 USD
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$ 418.99 USD
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ATI Super Damper / Harmonic Balancer - 10% Underdrive - BMW B58A (Gen1), B58C B58D (Gen2/TU) 3.0L
ATI Super Damper / Harmonic Balancer - 10% Underdrive - BMW B58A (Gen...
ATI - Corporate Logo
T#:43142743
Part#: 918352
Back Ordered
$ 451.99 USD
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$ 451.99 USD
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This ATI Super Damper is a direct replacement for the OEM Harmonic Balancer, designed to further reduce harmful engine harmonics that could lead to damage to sensitive engine components. The 10% underdrive function of this super damper is designed to increase usable horsepower by reducing parasitic power loss without greatly affecting engine accessories.
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ATI Super Damper / Harmonic Balancer - 21% Underdrive - BMW B58A (Gen1), B58C B58D (Gen2/TU) 3.0L
ATI Super Damper / Harmonic Balancer - 21% Underdrive - BMW B58A (Gen...
ATI - Corporate Logo
T#:43142744
Part#: 918351
Back Ordered
$ 418.99 USD
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$ 418.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This ATI Super Damper is a direct replacement for the OEM Harmonic Balancer, designed to further reduce harmful engine harmonics that could lead to damage to sensitive engine components. The 21% underdrive function of this super damper is designed to greatly increase usable horsepower for racing applications by driving engine accessories slower, reducing overall parasitic power loss.
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