i have a 2002 2500HD chevy silverado v8 with the 6.0 vortex. i wanted to get a new muffler to make my truck sound better and maybe give me some better power. the exhuast is dual 3in inlet to the stock muffler and dual 3in outlet that then goes to a y pipe and then a single tailpipe. i was wondering if anybody has this same set up and how they upgraded. Thanks in advance.