Front Section - 4.2L Naturally Aspirated (NAS Only) - From 2010MY

The front section comprises two separate pipes, each incorporating a catalytic converter. Each catalytic converter has a welded inlet pipe with a flange. The inlet pipe is flared into a cone which mates with the exhaust manifold. The flange has two holes which locate on studs in the exhaust manifold and is secured with flanged nuts. Each catalytic converter is fitted with a pre and post catalyst HO2S (heated oxygen sensor).

Each catalytic converter has a curved outlet pipe which mates with the respective inlet pipe for the applicable resonator on the center section. The joint on each pipe is secured with a clamp.