Turbo Oil Drain Pipe Gasket - Mitsubishi GTO/3000GT Twin Turbo Z15A/Z16A also called turbo oil return pipe gaskets Sold in Singles (You need 1 for each end of return pipes so 4 in total) Exploded Diagram Showing Locations Used HERE Mitsubishi Part Numbers MD050082 MD174244 MD194403 MD145171 MR258477