2.5 inch dynomax bullet muffler and go with a four inch tip. That way you can reuse stock piping. Muffler around 40. 50 or so to have it welded in from local shop. Tip 25 online with 10 weld fee from local shop. Total of 125 for great sounding exhaust. I have three inch si/so and am happy with it. I have videos and can help with part numbers if interested. Pm me if you want.
2006 xlt supercrew 4x4 6.5ft bed
315/70/17 Wild Peaks on 17x8 vtec, K&n intake, 3 inch si/so dynomax with 4 inch tip, diablosport, 2 inch AS level, rear airbags, tinted windows, bedliner spray bumpers, black headlights, black billet grill, 4.56 yukon gears