a lip spoiler TECHNICALLY is mounted on the front of the car under the front clip or front plastic part of the car. Now you also have low profile "lip" spoilers which are nothing more than a bump strip on a trunk. im guessing here he wants the front version. http://www.ecstuning.com/BMW-E39-540i-M6... that is what you are looking for.. now be VERY VERY careful here this is his baby he may not say it out loud to you but Im willing to bet if the house is burning down he'll save the car before you. no offence just how it is. So for me it is a cute gesture if the wife wants to get a piece for the car BUT personally I would rather pick it out myself. you would be better off cooking him dinner and doing some naughty things later.. If you REALLY want get him a good cleaning kit for the car a small 1 or 2 gallon shop vac with the car cleaning attachments. dont buy any cleaning chemicals again those are sacred in this case. You are dabbling in the area as if he would go buy you a purse ,shoes, or hair dryer.. its cute that he tried but you know what you want and nearly anything less wont be used...

You can google " What is a lip spoiler for car " and you see that it is kinda of generic term for some types of spoilers. Could be a front or rear lips spoiler.

But unless you know what type and style etc that he would want. Also how they are attached , etc.Most likely you will not choose the one he would have chosen.. Kinda of like if he you bought you some clothes that you dont really like and they didnt fit well ether.

So unless you are going to get him involved in choosing which to buy, then it might not be your best choice for a present.

Try carid web-site, these guys store a lot of cool stuff for 5 series Mercedes. I've found an AC-S rear spoiler made by Duraflex. Clean looking, stylish and aerodynamic.

Great gift idea!