OBDII Catalytic Converter (5592103) by MagnaFlow®. Converter Configuration: Direct Fit. Catalytic Converter Body Shape: Round. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". Catalytic Converter Overall Length: 38.625". 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.