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The secondary air inlets also allow the intake system to be more audible so the turbo spool and BOV can be appreciated
• Stock downpipes with factory calibration465 rwhp and 520 rwtq
Dinan set out to develop a more efficient heat exchanger
DINANTRONICS Sport Maximum Gains (M57): Up to 40 HP
Dinan Underdrive Crankshaft Pulley Kit - BMW M5/M6 RADG The secondary air inlets alsoDinan'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