The exhaust system for the 3.0L engine is a completely new development. It offers low exhaust back pressure, which increases the throughput of gas and therefore improves the engine's performance.
In addition, the layout of the exhaust system has been modified in order to give it a more sporty sound than the base model.
With the exception of the rear exhaust manifold, the entire exhaust system is made of special steel.
Up to the centre muffler, the system is laid out as a two-pipe system. Downstream of the centre muffler the system comprises a single pipe up to the rear axle, at which point the system splits again into a separate pipe for each of the final mufflers.
B
-
Version for 4/5 door variants
Different versions of the system are used depending on the body variant. On 4-/5 door variants, the system is routed underneath the rear axle crossmember, but on estates it is routed above. Furthermore, due to the extra space available on estates the final mufflers are slightly longer, and there are corresponding differences in the lengths of the end pipes.
The system comes from the factory as a single unit from the front muffler to the end pipes. However, only the rear section can be replaced in service.
The manifold on the front cylinder head is made of special steels. This material has been chosen because it can deform in the event of an accident, and therefore improves the reaction of the vehicle in the event of a crash. The upper part of the catalytic converter housing, which is mounted directly underneath the manifold, is also made of special steel. The lower part is made of cast iron.
The rear exhaust manifold is made of cast iron. In contrast to the 2.5L engine of the base model, the catalytic converter of the rear cylinder bank lies horizontally underneath the manifold.
In comparison to the 2.5L engine of the base model, the volume of both catalytic converters has been significantly increased, which also contributes to the improved performance of the 3.0L engine. An upstream lambda probe is installed on both of the manifolds, as well as a downstream lambda probe at the outlet of each catalytic converter.
The two intermediate pieces with integrated flexible pipes lead from the catalytic converters to the front muffler. The flexible pipes allow for movement of the engine, without transferring the movement to the remainder of the exhaust system.
