Upgrade or replace the old, damaged, or cracked exhaust manifold on your 2019-2023 Ram 6.7L Cummins to restore proper operation to your engine. Most exhaust manifolds available are cast in high-silicon ductile iron for increased durability. A failed exhaust manifold often cracks, or leaks, from heat cycles, age, and other conditions. This can result in boost leaks, or exhaust leaks that can reduce engine efficiency and rob you of power. BD-Power, Dorman, AFE, ATS, and many more are just some of the manufacturers you can find.