I installed my TRD Dual Exhaust tonight. Took about 1 hour all by myself, without lifting the truck off the ground.
Cost was about an hour of work, an hour of BSing with the parts guys at the local dealership, and $999.33 with tax (got them to match the lowest internet price I found). I know, I know, much more than aftermarket, so I don't really need to hear it, besides they make more money everyday.
I recorded the following 4 clips. Wow, you can actually do that here!
Single inside (windows up, then all 4 windows down)
Single outside (about 7 ft from the right rear corner on a 45 angle)
Dual inside (windows up, then all 4 windows down)
Dual outside (about 7 ft from the right rear corner on a 45 angle)
There is a real loud rumble at the end of TRD inside cab, a Semi went by.
Enjoy, I personally love the sound of this. It's not obnoxious, but definitely means business.