ISO 9001: 2000 and TS 16949: 2002 Certified! Catalytic converter can purify the wasted gas from vehicles, ships and engines effectively. Rated: 3.8L/4.250Ibs. Part No.: Inlet/ Outlet IDWcat005-175 1.75"/1.75"Wcat005-200 2"/ 2"Wcat005-225 2.25"/2.25"Wcat005-250 2.5"/ 2.5"Wcat005-300 3"/3" Catalytic Converter (WCAT005)