I went to AZ to check out a CAI. The guy there asked what I wanted to do with my car, etc. I told him I wanted to get more acceleration, free up HPs, and get better gas mileage. He said the CAI wouldn't do anything, nor would a new exhaust system, but a turbocharge system would do it all. He also asked where the tach redlined, but I couldn't remember and didn't get why he asked. I wanted to get a new intake, headers, exhaust sys., and all that. Doesn't the turbo include that stuff? What would be best?