Couldn't be any better/worse than the Mac. Only thing I would do is get some high temp ceramic paint and coat it before the install. I did this with my Mac H and although it stinks to high heaven for a few days it helps keep it from rusting. I'd imagine the Summit one could use a good coating as well. As far as fitment that is another issue. My Mac fit fine but I'd heard some had trouble getting them to fit. At any rate go get the for manifold gasket and use it instead of the cheap rubber gasket they give you with the pipe.