I'm getting LTs for my 6.0 and I'm contemplating on switching out the stock cats and single in, single out high flow muffler with a true dual setup and high flow cats/mufflers. Has anybody done this with their 6.0? Performance gains? Resonance? X-pipe?

 

Ill buy your corsa if you do go duals though. I have that setup on my 5.3 I noticed a bi difference in top end difference and lost just a bit on the low end but not much. Having the x-pipe will help with raspyness and cut dont a bit on resonance. If you are really worried about resonance then make sure you get it to ext out the rear and not dumped or out the side in front of the tire. I am going to run the same setup on the 6L but go 3inch off the headers to an x-pipe to 3 inch cutouts then neck down to 2.5 for the mufflers so I can reuse the tailpipe section.