The terms "upgrade" and "20's" don't belong in the same sentence. It's a sports car not a donk. Stick with 19's. They will be lighter and look a hell of a lot better in that fender than 20's will. Unless you don't plan to track your car and want to achieve that hellaflush look for whatever reason and don't give a damn about unsprung weight affecting whp. But that's just me
