Been running my SRT with the rear cats and "H" pipe deleted and have a "X" pipe in their place. Also have the muffler deleted and left the resonator in-place for back pressure. No drone because of "X" pipe and fairly mild sound until WOT. Been this way for over a year with no problems what-so-ever!
Originally Posted by
SouthernBronco
Also how does this affect the SC with the back pressure?
Back Pressure should be of no concern. If it was then the NeedsWings down pipes that replace the cats would be a no-no. The "X" pipe I used only helps in the scavenging effect and is therefore beneficial to the SC. Naturally I went to a smaller pulley to increase the SC pressure!
I've seen systems that used the downpipes (no cats) into a dual system with a "X" pipe integrated and straight flow muffs used with no problems.
See here:
https://www.crossfireforum.org/forum...aust-help.html