The vehicles have exact specifications when you order them. The 4.8i comes with a specific set of wheels; the sport pkg. comes with a specific set of wheels, and you have the option of upgrading to the 21" for a premium. They don't exactly have wheels laying around for customers to pick and choose. Otherwise you would have 3.0i owners choosing 21" wheels which may or may not be suitable for that specific vehicle.

If you plan on changing them anyway, order the least expensive set, without sport pkg and buy the set you really want. The best I could do with my dealer is negotiate a price on the 21" and 'trade in' the brand new 20" Y spoke that it comes with. They offered me half the retail price on the 20" so they can turn around and sell them. I don't know if I'll take them up on it. But again, this is at the dealer level and your dealer may offer you something else. Good luck!

By the way which style wheels do you want??