I have the stingers with o/r h pipe and overall I am happy, though at around 2500 rpms I get the trumpet noise and in the higher it kinda sounds tinny....dunno what I want to do about it, prolly nothing in the near future, as I love the nice burble I get out of the stingers. I will probably end up cutting my stock exhaust and using the stock h pipe and cats to see if I can eliminate the noise. I know you were asking about x pipe...but I've heard these mufflers tend to sound real tinny with any o/r mid pipe.