Exhaust System Description

THE L47 Exhaust System
The exhaust system on the L47 engine incorporates (in order from front to rear)
^ An exhaust manifold rear pipe (Y pipe)
^ A catalytic converter
^ A resonator
^ An intermediate pipe
^ Mufflers
^ Tailpipes

The exhaust crossover pipe is attached to the front and rear exhaust manifolds. A joint coupling, using a round graphite impregnated seal, connects the rear exhaust manifold pipe to the inlet of the catalytic converter. The rear exhaust manifold pipe contains a flex joint. The flex joint replaces the exhaust springs commonly used with bolts that attach the rear exhaust pipe to the manifold and crossover pipe. The intermediate pipe assembly is welded to the converter outlet.

THE L36 OR L67 EXHAUST SYSTEM
The exhaust system on the L67 engine incorporates (in order from the front to the rear)
^ An exhaust manifold front pipe
^ A three way oxidation catalytic converter
^ A resonator
^ An intermediate pipe
^ Mufflers
^ Tail pipes

The exhaust manifold front pipe is welded to the catalytic converter therefore, they are serviced as one unit. The exhaust crossover pipe attaches to the front and the rear exhaust manifolds.

All exhaust pipe to exhaust manifold connections are of the ball joint type to allow angular movement for engine roll motion.