Thanks for the replies. Mufflers are difficult simply because if you take ten people, you will get ten different answers on what sound they want. All I can say is that this setup works for me.

The wing came out just the way I wanted - can't really notice a difference due to the angle I have it set and also it's below the roof line but it looks cool (at least to me). I will say that on the freeway, this car tracks like it's on rails. It's probably a combination of shape, tires, and wing.

Have a great day.