Hey Guys, been in a member for a bit but only just bought my first XR6T (BFI, six speed auto, 65000k's) and have a question about the wheels on my car. It came with a set of Koya 20x8.5 on the front and a set of 20x10 on the back running 245's on thefront and 275's on the rear. I'm planning on getting a flash tune, to go along side the F6 CAI, Hi-Flo cat, and K&N I've just fitted. Hoping for a ballpark figure of 275rwkw. With that info, will having the wide treads on the rear cause any 'resistance' problems with my driveline/diff/tranny? I love the look of the wheels, and desire some more power, but don't wanna destroy my car either.