Your buddy's S550 wheel specs are not your S197's wheel specs, no matter how loud he says it at the meet. The 2005-2014 car has two right answers, and which one is yours depends on ride height. Here's the cheat sheet: 1. Know your generation first. The SN95 is 4-lug, and S550 fitment numbers don't carry over cleanly. S197 is 5x114.3 with a 70.5mm center bore. Wrong-gen numbers are how you end up rubbing or sitting like a rental. 2. Stock height? Respect Ford's tuck. The factory suspension leaves limited room before the fender lip becomes a problem, so a conservative offset keeps you clean without rolling anything. 3. Lowered? Drop the offset with it. Once the car comes down, the tire tucks further into the arch, and the stock-height number starts looking sunk in. Lower car, lower offset, flush stance. 4. 2013-14 GTs with the Brembo package pay a clearance tax. Those calipers are bigger than the base brakes, so not every wheel that clears a 2008 will clear yours. Check caliper clea...