E46 330 brakes with 320x22mm discs must be used

Onboard (0-5v) Valve Position Sensor

They're also simply not designed to handle increased boost levels

Replacement Diaphragm for Twin Port or HP IWG-75 actuators

and 7psi outer spring (Brown/Pink)

Clutch Kit - Xtreme Outback - Extra Heavy Duty Organic KTY23001-1AX JR33 E46 330 brakes with 320x22mmXtreme Outback Heavy duty sprung organic kit 1A Recommended for: Vehicles with significant performance modifications, are daily driven but also used off road and vehicles that tow regularly. The Extra Heavy Duty range of upgrades from Xtreme Outback are designed to offer the highest levels of performance for heavily modified street and off road vehicles. These kits offer a significant increase in clamping force (30 60% above the factory clutch) over