ACDelco Thermostat Bypass Pipe - 12565082 Part #: 12565082 Line: ACD ACDelco Thermostat Bypass Pipe 1 Year Limited Warranty Color: Black End 1 Type: O-Ring End 2 Type: O-Ring Material: Plastic Number Of Branches: 0 Outlet Inside Diameter (in): 5/8 Inch Hardware Included: No Bracket Included: No Overall Length (in): 1-15/16 Inch Overall Length (mm): 48mm Inlet Inside Diameter (in): 11/16 Inch Molded: Yes Gasket Or Seal Included: Yes Inlet Inside Diameter (mm): 18mm Outlet Inside Diameter (mm): 15mm Show More Show Less