I Have a 89 toyota supra turbo had it for a year or so and i know want up the hp and tq I street race and some of these mustangs and newer cars are starting to kick my butt lol so i was wondering how much it would cost to reach about 500 to 600 hp I dont really know much about cars,but i love them lots and love to go fast. this is my first supra and really want to learn lots about this car. thanks and hope to hear back