What constitutes cosmetic alteration vs performance? Some are obvious, some are not. Obviously engine mods kept hidden are performance. And custom paint jobs are purely appearance. I agree, I have not seen an aftermarket wing that I think looks good, they don't flow well with the lines on the car making them look like a cheap add-on (even if they are superior in performance from a purely track oriented perspective). But I lowered my NSX with Bilsteins (used the lower perch), and not only do I feel it handles better, but I think it looks better. To me, stock, the gap between the top of the tires and the fender looked too large compared to the gap between the front and rear of the tire to the fender. With the lowering of 0.8 inches, now the tires look like they fit the fender well perfectly. I also feel I get less body roll in turns, but now I have to be even more careful when going over curbs into driveways. I can scrape my front at my house if I don't approach at an angle, and there are some gas stations I use where one entrance is now totally avoided because of it's quick angle change. A small nuisance for what I perceive as improved looks and performance.