If you are replacing the exhaust manifold in your 5.9L Cummins, make sure you replace the gaskets with the Cometic MLS Exhaust Manifold Gasket Set. This gasket set is comprised of multiple embossed layers of both coated and uncoated stainless steel. The embossed layers of the gaskets are designed for a variety of harsh sealing enviroments, load conditions, and surface finishes. The Cometic MLS line of gaskets ensure a proper leak free seal everytime. Turbo flange gasket not included.