Pre-OBDII Catalytic Converter (334006) by MagnaFlow®. Converter Configuration: Universal Fit. Position: Rear. Catalytic Converter Body Shape: Oval. Without Air Tube. Without O2 Sensor Port. Catalytic Inlet Diameter: 2.5". Catalytic Outlet Diameter: 2.5". Catalytic Converter Overall Length: 16". OEM Spec. If your car needs a new catalytic converter, install one that will get you through the smog check. This universal fit converter will require some fabrication to be installed, which will involve cutting the exhaust pipe and may require welding.