Description

Exhaust System

CATALYTIC CONVERTERS
In the catalytic converters, the exhaust gases are passed through honeycombed ceramic elements coated with a special surface treatment called 'washcoat'. The washcoat increases the surface area of the ceramic elements by a factor of approximately 7000. On top of the washcoat is a coating containing palladium and rhodium, which are the active constituents for converting harmful emissions into inert by-products. The palladium and rhodium add oxygen to the carbon monoxide and the hydrocarbons in the exhaust gases, to convert them into carbon dioxide and water respectively.

FRONT SECTION - NORMALLY ASPIRATED ENGINES
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. The joint is secured compressed and sealed with a clamp.

FRONT SECTION - SUPERCHARGED ENGINES
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 resonator. The joint is secured compressed and sealed with a clamp.

REAR SECTION - NORMALLY ASPIRATED ENGINES
The 2 inlet pipes each connect into a separate resonator silencer. Each resonator silencer is cylindrical in shape and houses 2 perforated tubes separated by 2 baffle plates. Exhaust gasses exit each resonator silencer via an outlet pipe. The 2 outlet pipes are joined together behind the resonators with a cross over pipe. Each pipe also has a welded hanger bracket which allow the rear section to be supported on mounting rubbers. A further bracket is welded to each pipe which braces the 2 pipes together.
The 2 rear silencers each have a welded inlet pipe which mate with the outlet pipes from the resonator silencers and are each secured with a clamp. The inlet pipes each have a welded hanger bracket which support each rear silencer at the rear of the vehicle on mounting rubbers. The fabricated rear silencers have 2 perforated tubes which are supported on 2 perforated baffle plates. The exhaust gasses are expelled from the rear silencer via a single outlet pipe. The outlet pipe from each silencer has a welded hanger bar which support the rear silencer on mounting rubbers. The outlet pipe is fitted with a welded outlet which is covered with a polished stainless steel finisher.

REAR SECTION - SUPERCHARGED ENGINES
The 2 inlet pipes each connect into a single resonator silencer housing perforated tubes separated by 2 baffle plates. Exhaust gasses exit the resonator silencer via 2 outlet pipes. Each outlet pipe has a welded hanger bracket which allow the rear section to be supported on mounting rubbers. A further bracket is welded to each pipe which braces the 2 pipes together.
The 2 rear silencers each have a welded inlet pipe which mate with the outlet pipes from the resonator silencer and are each secured with a clamp. The inlet pipes each have a welded hanger bracket which support each rear silencer at the rear of the vehicle on mounting rubbers. The fabricated rear silencers have 2 perforated baffle tubes which are supported on 2 perforated baffle plates. The exhaust gasses are expelled from the rear silencer via a single outlet pipe. The outlet pipe from each silencer has a welded hanger bar which support the rear silencer on mounting rubbers. The outlet pipe is fitted with a welded outlet which is covered with a polished stainless steel finisher.

CATALYTIC CONVERTERS
A catalytic converter is fitted in each front section of the exhaust system. Each catalytic converter is fitted with 2 HO2S (heated oxygen sensor).
The HO2S (heated oxygen sensor) monitors the exhaust gasses leaving the engine. The ECM (engine control module) uses this information to provide accurately metered quantities of fuel to the combustion chambers to ensure the most efficient use of fuel and to minimize the exhaust emissions.