I am in the middle of this right now. Developed a really loud exhaust leak when cold on the right side. Dropped it off at mechanic on Monday. One of the studs (bolts?) broke while the manifold was coming out. He is trying to fix with the engine in but isn't sure he can. If not it will be engine out. Which, if so, I will have him replace both manifolds just to be safe (the manifolds are cheap). 95k miles on my truck but it is supercharged and I beat the **** out of it in Baja. Still cheaper then buying a new Raptor