Authentic TiAL Stainless Steel Valve Seat / Sealing Ring for the older TiAL 38mm F38 (2 bolt inlet)& TAL 38mm MVS (V38 V-Band) external wastegates. Select your wastegate from the menu. This part goes between the waste gate inlet flange & exhaust manifold to create leek free seal. If your wastegate is missing this item, it will completely destroy the proper function of the waste gate. It is an absolute 'must' part for the gate to function correctly.