Quote Originally Posted by will13k7 View Post
just a heads up, you might need to do some fender work to fit those 21's, the only S4 I've heard of that ran 21's had RS4 fenders fitted. it will be interesting to hear how it goes though. good luck!
If that is the case I will not be using them for sure and will just run my stock RS5 Rotary Wheels I have left over. Thanks for the info!