Turbosmart HyperGate45 (45mm) External Wastegates are designed to be equipped with Turbosmart's superior quality valve seat. The Turbosmart valve seat is precisely manufactured and machined for a tight fit, ensuring no air leakage and maximum performance. Turbosmart's high-quality material allows it to withstand anything that the engine can throw at it, allowing you to get the most out of your vehicle without worrying about the wear and tear on your Turbosmart wastegate. With Turbosmart's superior quality valve seat, you know you're getting the best performance from your Turbosmart HyperGate45 External Wastegates.