so...you know those ebay lip spoilers? Well I had a go at installing one just to see. I think I may keep it! All the ones that are supposed to fit our 9-5's are not quite the correct length, not to mention the angle at which the ends are cut at do not match the front-to-back line where the boot lid meets the sides of the car. Soo...I decided to order one from ebay extra-long and trim it myself. A little trim and then work with the dremel to shape the ends and it fits much better. Also they usually include that 3M double-sided tape pre-installed on the bottom, which I disposed of promptly. It's great stuff but it's just too thick so it caused the spoiler to be raised up too high IMO. I ordered the 3M tape that BMW uses to install it's lip spoiler on the M5, and it's super-thin and super-strong. Came out perfect!