I have stage III software, TB and airbox. I got them all at once. I was pretty disappointed when I got the car back because I couldn't tell any difference. I had the car dyno'd and it only put out 191hp

If I had to do it again. I would of saved the 2k+ I spent on it for FI

The airbox is just as quiet as the stock one. So if your looking for intake sound the Dinan ain't it.
It uses the stock base and replaces the top cover with a much bigger one. There is a snorkel that goes into the drivers side air duct for cold air.