I have a g37s coupe with the aerodynamic kit that comes with the anniversary edition 2010.... i want to space my wheels out..which would you recomend i go with? 15mm ? 20 mm? im not sure what to do..... will my wheels locks work still?

 

I'd do 15mm because when your tires wear out you'll want to go up to 245/40 front and 275/35 rear, and yes your wheel locks and lugs still work