The Vevor catalytic converter 2-pack is designed for 2004-2006 Jeep Wrangler 4.0L L6 models and fits the front and rear replacement positions. It is built with heavy-duty T409 stainless steel and a ceramic honeycomb carrier to help improve exhaust flow and purification efficiency. The converter meets OBD III standards and features an M18 O2 sensor port for compatibility with original vehicle oxygen sensors. Its bolt-on, flange-to-flange design with included gaskets supports straightforward installation. This replacement also helps reduce exhaust noise and address common catalyst efficiency issues such as the P0420 code.