I am looking at putting true duals after the cats, and wanted to know if the gains would be better than a catback single single muffler system. I plan on doing head work (clean the bowls and port match), and after the warranty runs out cam and headers. So I thought way pay twice. I just don't want a system that will kill what little gains I have made so far.

 

we have done a few systems for the trucks . heres what we do . from the high flow cats we run pipe back to a 2.5" x pipe and then run to dual mufflers (usually 2.5" mac flowpaths) and the either dumps or full tail pipes back . the entire system is 2.5" diameter.tips are optional. the gains won't be great with the mods you have but the more mods you get the better the exhaust is going to work for you. <img border="0" alt="[Truck]" title="" src="graemlins/gr_truck.gif" />