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THORLEY EXHAUST HEADERS  -- Made in the USA High temperature ceramic coating to resist corrosion and improve cooling of the engine compartment. Specially designed for the GMC Motorhome to improve breathing and efficiently draw the exhaust gases from the combustion chamber. Theoretically, lowering the temperature of the cylinder and the combustion chamber creates a denser fuel charge and allows your engine to create more power. Comes with oxygen sensor ports for those coaches equipped with fuel injection. The Installation kit includes gaskets, reducer adapters to join to exhaust pipes, flange gaskets. The approximate dimensions of the package are 36hx20wx16L. Please indicate 403 OR 455 CID V8 motor INTAKE MANIFOLD, EXHAUST BLOCK OFF PLATE W/ GASKET Our coaches have an exhaust bypass passage through the intake manifold, under the carburettor to provide carburettor preheat and prevent icing in very cold weather. This block-off kit allows engine to run cooler and helps prevent vapor-lock. Please indicate 403 OR 455 CID V8 motor           .     
EXHAUST PARTS
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Most of our exhaust parts are made in the USA. We keep them in stock and they can be installed in our shop or shipped directly to you the same day.
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Check Price and Availability Check Price and Availability GMC Design Center original clay model for GMC Motorhome GMC Motorhome Exhaust header kit GMC Motorhome Intake Manifold Exhaust block-off kit
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Check Price and Availability Return to Parts Index Check Price and Availability
THORLEY EXHAUST HEADERS  -- Made in the USA High temperature ceramic coating to resist corrosion and improve cooling of the engine compartment. Specially designed for the GMC Motorhome to improve breathing and efficiently draw the exhaust gases from the combustion chamber. Theoretically, lowering the temperature of the cylinder and the combustion chamber creates a denser fuel charge and allows your engine to create more power. Comes with oxygen sensor ports for those coaches equipped with fuel injection. The Installation kit includes gaskets, reducer adapters to join to exhaust pipes, flange gaskets. The approximate dimensions of the package are 36hx20wx16L. Please indicate 403 OR 455 CID V8 motor INTAKE MANIFOLD, EXHAUST BLOCK OFF PLATE W/ GASKET Our coaches have an exhaust bypass passage through the intake manifold, under the carburettor to provide carburettor preheat and prevent icing in very cold weather. This block-off kit allows engine to run cooler and helps prevent vapor- lock. Please indicate 403 OR 455 CID V8 motor           .     
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EXHAUST PARTS
Alex Sirum GMC Motorhomes, Inc. 1800 Hwy 70 East Okeechobee, FL 34972 Phone: (863)763-1121  Fax: (863)763-1124