Originally Posted by fltengkev
I got a 08 4.7L also. I've got an Airraid CAI, Flowmaster exhaust, Poweraid throttle body spacer and Bully Dog GT Tuner. I'm very impressed with the increase and power. Also got a couple extra MPG's out of it too. Don't recommend the throttle body spacer though. Got nothing out of it. Hope this helps.
I've got the same throttle body spacer, and you're right, it does nothing as far as gains.