anyone out there have a mac h pipe with flowmaster catback on a 99+gt?
was there a good fit or did you have to make modifications?
The reason i ask is b/c the shop that is going to do the install told me that sometimes the two are not compatable......
I'm about to have mine put on and from what I've heard you need to replace the studs on the pass side manifold. Napa part # 600-1819. My Prochamber looks diff. from others, I guess they make them as 3 peice pipes now for adjustment, so I don't know how well it's going to fit yet.
They are making them three piece pipes now for those that want to upgrade to longtubes later.. so you do'nt have to buy a new Hpipe / xpipe, like i have to do..