Upgrade or replace the old, damaged, or cracked exhaust manifold on your 1994-1998 Dodge 5.9L 12V Cummins to restore proper operation to your engine. 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. Durable, high-silicon ductile iron manifolds are offered as an upgrade or stock replacement for many applications. You'll find top-notch brands such as AFE, BD-Power, ATS, Dorman, and more.