Originally Posted by
velociabstract
I have the exhaust parts in a box that will work with slight modification. Do the X pipe. My shop tells me headers don't do anything for most modern cars (new Mustang 5.0's for example) but an X pipe does. Go figure. The SRT exhaust is 2 1/4 outside diameter until the resonator.
Les
Thank you Les, PM sent. I want to keep the H-pipe and back for easy return to stock, so I'm hoping an X-pipe(in place of where the rear cats once lived) and the stock H-pipe will be a good thing.