MagnaFlow California Direct-Fit California Obdii Converters Fits select: 2004 BUICK RAINIER, 2004 CHEVROLET TRAILBLAZER

OBDII Catalytic Converter (4451172) by MagnaFlow. Converter Configuration: Direct Fit. Without Air Tube. With Pre and Post-Cat O2 Sensor Ports. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". Catalytic Converter Overall Length: 54.5". If your car needs replacement, install one that will get you through the smog check. This converter will directly replace the factory unit, with little or no fabrication required. The Direct Fit Catalytic Converter is an exact replacement for your stock converter, with an interface at either end that will allow it to be bolted into the exhaust system. No fabrication or modifications are usually required. It’s available in OBD II (On-Board Diagnostics, 2nd Generation), Pre-OBD II, and OEM Grade OBD II configurations. Pre-OBD II is for early vehicles (generally 1995 or older), which were equipped with 2-way, 3-way, or 3-way with air injection converters. Two-way converters oxidize harmful Hydrocarbons (HC) and Carbon Monoxide (CO) along wit EO# D-193-137