Its hard to say what's really done to the car because he doesn't really know much about these cars. I can't see someone gettin all that stuff done and NOT gettin a good tune. But, having said that, I like the gtx. Its a cool car. I've got gtx tips on my car. Find someone in ur area that knows something about our cars and get it looked over. Only way to go on an already modded car. Personally I'm with bio. Find a gtp and build one urself for much cheaper