Exhaust System

The 3.5L Twin Independent Variable Cam Timing (Ti-VCT) exhaust system consists of:

• a LH one-piece catalytic converter manifold that is mounted to the LH cylinder head.
• a RH one-piece catalytic converter manifold that is mounted to the RH cylinder head
• an exhaust Y-pipe that is mounted to the LH and RH catalytic converters along with the muffler and tailpipe assembly.
• a resonator which is part of the muffler and tailpipe assembly.
• isolators installed on the body and muffler hangers.

The 3.5L Gasoline Turbocharged Direct Injection (GTDI) exhaust system consists of:

• two turbocharger-mounted catalytic converters.
• two flexible pipe assemblies.
• an underbody catalytic converter.
• a muffler and tail pipe assembly.
• isolators installed on the body and muffler hangers.

Overview

NOTICE: Do not use oil or grease-based lubricants on the isolators. These lubricants may cause deterioration of the rubber. This can lead to separation of the isolator from the exhaust hanger bracket during vehicle operation.

The exhaust system provides an exit for exhaust gases and reduces engine noise by passing exhaust gases through the catalytic converters and muffler assembly. Rubber exhaust hanger isolators attach the exhaust system to the mounting hooks.

System Operation

3.5L Ti-VCT

Exhaust gases pass through LH and RH catalytic converters into the exhaust Y-pipe assembly. The exhaust gases then flow through a resonator which is part of the muffler and tailpipe assembly.

3.5L GTDI

Exhaust gases pass through the LH and RH turbochargers, catalytic converters and then into the LH and RH exhaust flexible pipes. The exhaust gases then flow through the underbody catalytic converter and a resonator which are both part of the muffler and tailpipe assembly.