Exhaust sounds True duals vs X-pipe or H-pipe.
I've had a Pypes 2.5" dual exhaust system with X-pipe on my Duster (400-hp 360) since 2010 and I agree, I'm not a fan of the X-pipe sound. When I eventually go from the current shorty headers to proper long tubes I'm gonna run 3" pipes from the collectors all the way to the mufflers and then neck down to 2.5". I may add an H-pipe to tune the secondary length of the headers shorter but that would be the only reason besides making the exhaust quieter.