I actually meant only engines, brakes etc. would affect the performance. Fronts, rears, sides, and wings wouldn't, they would just be your preference on appearance.

Fatal inertia is a wipeout style game I have and if you look at the customization, you'll see you have four ships to choose from, and you sort of build on that by choosing upgrades for it. That's what I mean. You'd choose a basic platform and build from there. Every platform would have different visual parts.

Also, something that I think would be cool is something called autosculpt from some of the Need For Speed games. You pick a basic part like a bumper, and you can change the size of the vents and stuff. You make the part just how you want it. This would be cool for cosmetic parts.