Get a new exhaust manifold to replace the old, damaged, or cracked factory component on your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax. 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. Most exhaust manifolds available are cast in high-silicon ductile iron for increased durability. Industry-leading brand such as Dorman, AFE, BD-Power, ATS and more are available.
