On eBay there are various rear decklid spoilers for sale for the e39. Some are 'M5 style' and others are 'M3 style'. Does anyone know the difference? I am assuming that I'd want the M5 type one, but I thought I'd throw it out here for your opinions.

Just make sure which trunk lip your are buying. I ordered one and when i got it it was rubber, looked real cheap.

If your are going to do it then you probably want M5 style.