sweet sweet, were just wondering cause i've got 2x hsv twin 2.25' exhaust and i'm putting one of them on tomorrow but not sure which one as there different slightly............................................. -one lines up 100% and could fit it in 10mins but has the dints/flat bits thru it, 1 h pipe and has smaller inlet/outlet to mufflers(there tappered in to fit in hole) and the mufflers off set like standard muffles.............
-the other lines up but got no hangers on it yet but has got no dints , 2 h-pipes in it, and flairs bigger at muffler inlet/oulet (tappers out larger) and the mufflers are alot longer and in/out pipes almost look like straight thru,(just off line by a inch)
not sure if there'd be any difference in the 'power gains' side of it or not, , and the one i dont use is getting cut up to put straight thru tail pipes on it so theres no changing my mind