155879A Manifold Gas Exhaust fits Oliver Tractor 1750 1755 1800 1850 1855One New Aftermarket Replacement Gas Exhaust Manifold for Oliver Tractors This aftermarket replacement exhaust manifold is designed for Oliver gasoline engine tractors in the 1750, 1755, 1800, 1850, and 1855 series. It routes exhaust gases away from the engine's cylinder head and into the exhaust stack. This part is for gas engine models only it does not fit diesel engine versions of these tractors. Compatible Models Oliver (Gas Engine Only): 1750,