WastegatesSPA Turbo wastegates are a study in form following function. Only the finest materials are used from the stainless steel springs to the proprietary teflon isolated diaphragm that stands up to the intense heat demands while maintaining lubrication. Before they leave the factory each unit is individually inspected and bench tested to ensure proper seal and function. Our units come with a one year limited warranty and are a great compliment to our manifolds.