Dinan Underdrive Pulley Kit | E90 · E92 · E93 M3 | 4.0L V8 [S65] MK2 TT (8J) 3.2L VR6 In and of itself

In and of itself

and durability

GFB G-Force III Electronic Boost Controller

especially at higher boost levels

Dinan Underdrive Pulley Kit | E90 · E92 · E93 M3 | 4.0L V8 [S65] MK2 TT (8J) 3.2L VR6 In and of itselfDinan's underdrive pulley is designed to increase power (11 horsepower 8400 RPM and 7 lb ft torque 8400 RPM on a stock car) by reducing parasitic drag on the engine from spinning the alternator, water pump and AC compressor. This is accomplished by slowing down the speed of these accessory drives that rob power from your engine. Dinan has done extensive hot weather testing so you can be assured that your engine is safe. The Dinan underdrive pulley is