Modify my RS5
 

Buying the wife an E-Tron. I’m going to sell my R8 (yes I know! I’m 6’4” and I’m just not comfortable!!) and take the wife’s RS5 coupe and mod the hell out of it! Open to ALL suggestions! Program, big turbo, intercooler, exhaust, what DONT I know? Will the factory transmission handle the extra HP!? Any advise is appreciated!!