The Full-Race Formline Cast Stainless Exhaust Manifolds for the Gen 2 (2017-2020) Ford Ecoboost 3.5L engines are a direct replacement for the OEM cast iron exhaust manifolds. Due to some inherent flaws, the oem cast iron manifolds are known to warp or crack, resulting in costly repairs. Besides that, the oem cast iron manifolds don't flow very well and present fitment challenges when used with larger turbos. The full-race formline cast stainless manifolds solve these issues. Cast from 347 stainless steel, the formline manifolds resist warping and cracking . These manifolds are a 100% bolt-on replacement - including new OEM gaskets, studs and nuts.

For years 304 stainless steel has been a go-to material for sturdy, long lasting turbo manifolds and other motorsport exhaust components. It's known that Ford EcoBoost 3.5L owners push their engines hard and demand extreme reliability under grueling conditions - failure is not an option. That's why we’ve opted for an upgrade from 304 stainless steel to 347 stainless steel. 347 stainless is commonly found anywhere high temperature and highly corrosive environments exist - from refinery equipment to jet engine parts. This material maintains superior resistance to any type of failure under high temperature operating conditions.