I have a 2006 GT 5-spd that I got used (the guy only had it like 6 months before he ordered a GT500). My question is, I'm looking to upgrade my rear gears, get a little more acceleration out of the car while it's on the street. But I don't know what to go with, and to be honest, I don't even know what the car has in it stock. I still have to drive the car on the highway a lot, my college is 210 miles from home, so highway MPG is important. Is there a nice medium on gears, better acceleration without killing MPG, or is it all or nothing? Thanks for your help, ANY advice or personal opinions on this would be great!