On the 08 and up the best bang for your Buck is just a magnaflow muffler swap into the stock piping. The stock piping is already a dual in with single 3" out. You'll get about the same gains from just a muffler swap on the 08 and ups as about any catback. I had mine done for 125 at a shop including the muffler so its also a lot cheaper than any catbacks. The pns for the mufflers are 12278 for the 18" and 12588 for the 22".
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New ride: 2010 Crew Cab Pro-4x; Volant Powercore intake; Magnaflow muffler swap
Coming Soon PRg leveling kit
Old Ride:2004 King Cab LE with Off-Road and Big Tow
PRG Leveling Kit, JBA Cat-Back Exhaust w/ SLP Loudmouth muffler,New Volant Powercore Intake,2 degree advance,Axle Vent Mod, Stillen Differential Cover w/M1 75w-140
Other rides: 2008 Armada SE; All stock and will probably stay that way since it is the wifes. We'll see.
2004 Dodge 1500; Wifes first truck so we kust kept it. All stock.
1972 Ford F100 Ranger XLT; 360 with cam, headers, edelbrock 600, Edelbrock Al. Intake, straight pipe dumped below cab. Its loud. (thinking about possioble VK56 swap in the future when done with school)