I'm going with TRUE DUAS. need suggestions
 

Allright so I'm going to hook up some trueduals and get rid of my cut out and y-pipe set up w/ no cats

I was planning on going with 2 1/2" pipeing, and then to glassbacks

what mufflers is everyone running and what sounds he best on a ls1!!!!?

well i dont recommend "glassback" or did you mean glasspacks??!! Anyways are you planning on dumping, under axle, or over the axle? Dumping the exhaust at the rear axle sounds the best, but very loud on the interior and will cause rattles. Over the axle is will be quieter but will sometimes cause more rasp and drone. Look into the magnaflow 4" round mufflers (part # 10416). These mufflers seem to do very well with eliminating drone and rasp.

thanks for the help, I'm going to go with dumps befoe the axle. I will still keep my CME but for looks only

I wouldnt put asspacks on anything but maybe a 70's model pickup.

The best sounding setup you are gonna find from all the systems I have built is a true dual H pipe system with 1 chamber flowmasters dumped.

yeah if ur dumping the flowmasters 1-chamber mufflers is what you want. Magnaflows would be my second option.