Get a new exhaust manifold to replace the old, damaged, or cracked factory component on your 2007.5-2018 Dodge 6.7L Cummins. Due to heat cycles and age, exhaust manifolds can be prone to cracking and cause boost or exhaust leaks. This can rob you of power and reduce engine efficiency. Most exhaust manifolds available are cast in high-silicon ductile iron for increased durability. You'll find top-notch brands such as AFE, BD-Power, ATS, Dorman, and more.