I have seen the video on youtube with the 1 chambered exhaust on a tundra but does anyone have video of true duals or anything with the tundras? I am trying to find out if this changing mufflers is worth it? Any with powersticks, turbo tubes or the classic chambered exhausts on the 4.7L?

as far as making your exhaust louder I think you are pretty limited due to passing inspection...you can add a set of headers and/or an aftermarket y-pipe (some have said that it fills out the exhaust note more, but I don't really know for sure), CAI (just for noise basically), or just find the shortest glasspack muffler you can buy and use that. other than that I really don't know how much change you will get from swapping a different type of muffler besides a different sound (not necessarily louder just different...if you know what I mean)

Its still a V8 so it wont sound like a buzzing 6cyl thats for sure.