Dinan 06-10 BMW M5 Underdrive Pulley Kit

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, 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.

Lightweight billet aluminum crankshaft pulley, black anodized and engraved.

All accessories are underdriven by 13% to decrease drag on the engine.

13 Percent Underdrive - Billet Aluminum - E60/E63/E64

Dinan Underdrive Crankshaft Pulley Kit - BMW M5/M6

Includes mounting hardware and shorter belts.

Dinan 06-10 BMW M5 Underdrive Pulley Kit

UNDERDRIVE PULLEY KIT S85 STRE

Pulley Kit

DIN ECP