1299452 X6 Gasket Exhaust Manifold Fits CAT 3406B 3406CSix New Aftermarket Replacement Exhaust Manifold Gaskets Fits Caterpillar (Fits CAT) Engines and Equipment This set of six (6) exhaust manifold gaskets seals the exhaust manifold to the cylinder head on Fits Caterpillar 3406 series and related engines. Each gasket forms a critical high temperature seal at the exhaust manifold port, preventing exhaust leaks that can cause power loss, increased emissions, and engine damage. Compatible with a wide range