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Seal hot exhaust gas inside the manifold joint with the Cummins Exhaust Manifold Gasket. The two mounting holes of the Cummins 5664401 must line up with the flange hardware so the gasket sits flat across the joint. Once clamped between the mating flanges, the gasket closes the narrow path where combustion gases could otherwise escape, helping keep heat and exhaust flow inside the intended passage. That hole pattern and sealing shape matter together because the gasket has to sit flat while the joint is tightened.
"GASKET,EXHAUST MANIFOLD"
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