I am looking into getting the M3 front bumper moulding for my 328is. As i understand it, there is a fiberglass/plastic piece that sits over the bumper. It screws on to the frame and replaces the bumper and area where your foglights are. It gives it a more aggressive look by having a front-angled lip and some other minor tweaks. It looks a hell of a lot better on dropped cars w/ 17 inch wheels (or 18's). Anyway, the prices i have seen are right around $300 from www.bavauto.com
. I don't know if that includes a 'pre-paint' for the colour of the car.