Re: ed xr6 exhaust system?????????
a set of try y's, makes sure your cats have 2 1/2" inch openings, then a good 2 1/2" with a straight through muffler will help you get the gains you want.
as far as the cat issue goes, all the cats that are made in aust, all share the same catalyst brick, so you wont gain much from gettting highflow cats, by enlarging the openings you practically saved yourself heaps of $$$$$
hope this is of some help
std stroke, alloy heads, comp cam, tfs manifold, 75mm t/b, 70mm maf, 30lb inj, adj fuel press reg, twEECer