From the research I've done it seems like my setup would be better served doing 2.5" exhaust, and the HeartThrob is 2.25". I'm just gonna keep my eyes peeled for a set of GM manifolds and have the shop fab up a 2.5" system. Searching this forum and a few others leads me to believe a pre-fab 2.5" exhaust for a 350 doesn't really exist. Almost pulled the trigger on the
Wysco Ram Horn Manifolds though.