Turbosmart 45mm Wastegate including both V-Band Flanges, Clamps, and all installation hardware. Wastegates are an essential part of any turbocharged powerplant. Controlling boost not only ensures that you are maintaining the correct pressures for the fuel you are running, but it also prevents overboost situations where the turbocharger is forced to spin faster than it would like. In these instances, you actually can loose horsepower, as the air is being super-heated by the compressor. This Turbosmart unit will handle boost control duties flawlessly when placed in a well designed system.