Ok, I know a little about cars, but I have no clue in this department about making my 1.8T go faster. I mean I don't even know the terms, but I know they make boxes to plug in and it remaps adding horsepower and supposedly fuel mileage. It's hard for me to imagine getting both since they seem to contradict, but that's another matter. So what do I need to know? Are there decent inexpensive brands of these boxes that easily install? Thanks for any direction, I didn't even know what terms to google.