Exhaust System

The 2003-2007 5.9 Cummins exhaust category is not just about sound. Exhaust brakes, 4-inch and 5-inch systems, turbo-back kits, and downpipes all matter on trucks that tow or need lower exhaust restriction.

Most upgrade paths include exhaust systems, exhaust brakes, downpipes, mufflers, clamps, and related hardware for 5.9 Cummins trucks. BD exhaust manifolds and MBRP-style systems fit the kind of truck that still works for a living.