By manipulating the reference signal to an internal wastegate actuator or external wastegate

cost effective external wastegate

Either M or nonM front coilovers would work with Wisefab E90 knuckle

the Shortie provides razor sharp boost response and significantly greater boost handling abilities

FPR12 Pro M 5 Port Mechanical Pump Suit -12AN (Black) TS-0404-1352

90 Elbow 3.50" BLACK" Hub Rings By manipulating the reference signalHigh performance multi layered Silicone hose. Constant temp resistant from 50 to 170 degrees Celsius ( 60 to 340 degrees Fahrenheit) and pressure rated to 220PSI with a 5mm wall thickness. Engineered to Win by Turbosmart.