Get a new exhaust manifold to replace the old, damaged, or cracked factory component on your 2011-2016 Ford 6.7L Powerstroke. Most exhaust manifolds available are cast in high-silicon ductile iron for increased durability. 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. You'll find top-notch brands such as AFE, BD-Power, ATS, Dorman, and more.