[WardL]

The Superformance "recommendations" are 275/40 and 335/35 (or 315/35) on 17" wheels. The 15" tires are 255/60 and 275/60 (or 295/50). You have so much power I would think you want as much rubber on the road as possible. Your wheel size might make a difference what you can fit. I don't have any first hand experience of any other size than the size I have.