I got my Frpp stingers from 50resto if im not mistaken. They sound great with the stock H, but they sound really good with the off road Xpipe. It sounds good to me because its what i wanted, sounds like a raspy F1 race car. But if you are into the old muscle car scene type deal i would look into maybe some other type of mufflers. Or atleast matching these up with an Off Road Hpipe. That doesnt sound bad at all either. Just not as high pitched, but very deep and "grumbley".... If that makes sense?