Reference Manual

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Chapter 9: Exhaust: Diesel, Dual-Outlet

Some G body diesel exhaust systems are a dual-outlet exhaust system. Its components include the headpipe, which connects an intermediate pipe to the back of the passenger side exhaust manifold, the intermediate pipe, the muffler, and the tailpipes.

The G body diesel dual outlet exhaust system uses a pair of cast iron manifolds bolted to the heads. Exhaust gases from the driver side manifold are directed by a crossover pipe to the passenger side manifold. An exhaust pipe bolted to the passenger side manifold directs the exhaust gases to the intermediate pipe.

The intermediate pipe carries the exhaust gases under the propeller shaft over to the driver side where the intermediate pipe then travels up and over the rear axle to a muffler suspended laterally between the rear axle and the fuel tank. Exhaust gases enter the driver side of the muffler and exit from outlets on both the passenger side and the driver of the muffler. A pair of short tailpipes from the muffler carries the exhaust gases to behind the passenger and driver side rear tires where the exhaust gases exit to the atmosphere.