This is the GrimmSpeed External Wastegate Gakset. It's a quality stainless steel gasket designed to endure the extreme temperatures that are associated with turbo exhaust components. This particular gasket has been designed for 38mm 2-bolt external wastegates, and anytime you perform a service that requires the removal of your aftermarket 38mm external wastegate at the least, inspect the condition of you gasket to avoid an exhaust leak.
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