depends on if you needs cats or not ???? either way I like the mustangtuning.com pipes , hearing good things about the catted and non catted X pipes they sell , if you want the H instead of the X then I dont know who to recommend ..
I love my MAC O/R H-pipe. Havent had it on for long but so far no problems at all. There is a clip of my car in my profile so u can hear what it sounds like. I dont know much about catted H-pipes.
prochamber w/flowmaster 40's will be very nice. I have full american thunder catback and a flowtech o/r H pipe. I only paid like $135 shipped for my H pipe from a local shop in town and it was a PITA like none other to install. I did it myself but it took a while. I ended up replacing the manifold studs and that wasn't very fun. You get what you pay for. BTW I love the way my car sounds.
I had the Bassani X pipe and took it off to replace it with the MAC prochamber. Love the deep sound in the Prochamber and its not loud but has a nice tone.