This direct-fit catalytic converter is designed for select Cadillac, Chevy, and GMC vehicles with 4.3L V6 and 4.8L/5.3L V8 engines. It features a 400-cell honeycomb ceramic carrier and 600-molybdenum catalyst to help reduce harmful emissions and support efficient exhaust flow. The heavy-duty T409 stainless steel construction is built to resist heat, rust, and pressure in the exhaust system. Its bolt-on, flange-to-flange design and included gaskets allow for straightforward replacement installation. An integrated M18 O2 sensor port supports compatibility with original vehicle oxygen sensors.