Upgrade or replace the old, damaged, or cracked exhaust manifold on your 2017-2019 Chevy/GMC 6.6L L5P Duramax to restore proper operation to your engine. Durable, high-silicon ductile iron manifolds are offered as an upgrade or stock replacement for many applications. Exhaust manifolds can fail due to cracks or leaks from heat cycles, age, and other extreme conditions. These leaks can reduce power, and also hurt engine efficiency. You'll find top-notch brands such as AFE, BD-Power, ATS, Dorman, and more.
