Design

Exhaust system
The exhaust system primarily consists of four sections. Manifold (and turbocharger (TC) if the engine is turbocharged), three-way catalytic converter (TWC), heated oxygen sensors (HO2S) and muffler. The exhaust system is manufactured from chromium steel sections welded together. The pipes are isolated so that the gas flow from the cylinders do not clash and to ensure good flow distribution in the three-way catalytic converter (TWC). There is a boot on the three-way catalytic converter (TWC) to compensate for manufacturing and installation tolerances.

The entire exhaust system is manufactured in chromium steel. A catalytic converter consists of perforated ceramic beads or metal substrates. These are coated with a Wash-coat and then a further coating of the catalytic inert metals, platinum, palladium and rhodium. Heated oxygen sensors are used to control the engine and monitor the catalytic converter. There is one heated oxygen sensor before and one heated oxygen sensor in the catalytic converter. There is a further heated oxygen sensor fitted on the manifold for B5244S7.