A-1342786C1 Gasket, Exhaust ManifoldOne New Aftermarket Replacement Exhaust Manifold Gasket Fits Case and Fits Case IH Tractors This exhaust manifold gasket seals the joint between the exhaust manifold and the cylinder head on Fits Case and Fits Case IH diesel tractors equipped with the 401, 451, and 504 cubic inch engine series. A proper seal prevents exhaust gas leaks that can reduce engine performance and introduce fumes into the operator environment. Compatible Models Fits Case