Dinan Underdrive Crankshaft Pulley Kit - BMW M5/M6 13 Percent Underdrive - Billet Aluminum - E60/E63/E64 BMW X1 U11 and more to achieve greater

and more to achieve greater power and torque in all diving modes

charge air pressure is directed directly at the compressor wheel which helps keep the turbo spooled upon lifting the throttle

With a straightforward procedure involving unbolting the top bridge

Hard anodized finish on the adapter

A US spec setup is needed

Dinan Underdrive Crankshaft Pulley Kit - BMW M5/M6 13 Percent Underdrive - Billet Aluminum - E60/E63/E64 BMW X1 U11 and more to achieve greater13 Percent Underdrive Billet Aluminum E60 E63 E64 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