[91GTturbo]

I don't have any experience with the BBK h-pipe, but I do have the dynomax ultra flo mufflers. I run them because turbo's don't like chambered mufflers like the flowmasters. As far as sounding near stock, maybe if you ran them behind some cats, but on mine (no cats), their fairly noticeable under normal driving, under WOT their fairly loud. I've always run flowmasters and I'm still trying to get use to the different sound of the ultra flos. I'm running a mac passenger side header and other than have to heat and bend my crossover pipe to get it to seal correctly with the header, it's held up pretty good so far. I have heard plenty of bad stuff about mac lately, so if I were buying new stuff right now, I would probably stay away from them as well.