New gaskets may not be required unless the ... an extra-wide racing flange is available for 12- and 24-valve Cummins exhaust manifold applications. As much as we like the 5.9L Cummins powerplant ...

If you want to learn more about why the exhaust manifold is so important, as well as more about the consequences of running your Cummins diesel engine (and other engine types) without one ...

New gaskets may not be required unless the ... an extra-wide racing flange is available for 12- and 24-valve Cummins exhaust manifold applications.