A-98493305-AI Gasket, Exhaust ManifoldOne New Aftermarket Replacement Exhaust Manifold Gasket for Fiat Hesston and Fiat Someca Tractors This aftermarket replacement exhaust manifold gasket seats between the exhaust manifold and the cylinder head, forming a heat resistant seal that prevents exhaust gas from escaping the combustion chamber. A failed exhaust manifold gasket can result in exhaust leaks, ticking noises at startup, and reduced engine efficiency replacing it restores a proper