To replace the Catalytic Converter, first, begin with raising and supporting the vehicle. First, if present, remove the oil pan skid plate with the next step being to remove the transmission crossmember. If replacing three ways Catalytic Converter, remove heated oxygen (HO2S) sensors; otherwise, disconnect their harness connectors. Then, detach the nuts that connect the Catalytic Converter pipe (to the Exhaust Manifold and the Catalytic Converter to the Muffler) then pull out the Catalytic Converter pipe assembly from the vehicle, dispose the exhaust seals (2 and 3). For the installation, install new Exhaust Manifold seals (2 and 3) and attach the Catalytic Converter pipe to the exhaust manifolds. Fix the Catalytic Converter pipe on to the Exhaust Manifold nuts and firm them fully to 50 nm (37 lb. Ft.), then the Muffler with the Catalytic Converter nuts and tightening the clamp bolt fully to 45 nm (33 lb. Ft.). Reinstall the transmission crossmember. If the sensor is re-installed, then a special anti-seize compound, that is composed of the liquid graphite and glass beads, should be applied on the ho2s threads. If changing the three-way Catalytic Converter put on the heated oxygen (HO2S) sensors. Otherwise, connect the harness connectors. Lastly, install the oil pan skid plate if so equipped, lower the vehicle and check for exhaust leaks.