I want to add a trunk spoiler onto my car preferably hamann or acs.......i am thinking on dis but dont know if i should go for it or not.......if i add the spoiler and decide to use silicone or some type of glue to have it installed......will i be able to take it of later on? and will it leave marks?

Not sure how ACS or Hamann trunk spoiler is put on, but the M5 rear lip spoiler uses only double-sided tape. Maybe it's the same? There are quite a few members here with ACS spoiler so hopefully they'll chime in.

If you use silicone glue, you will not be able to remove it without repainting your trunk. Because the paint of your car will come off with the glue. This is by experience a couple of days ago. My spoiler came off, so I wanted it removed but they said they had to repaint my trunk if they remove it, so they had to shave off the old glue as smooth as possible, and stick the spoiler with new glue over the old glue, it looks bad, because some of the old glue was showing, because they had to re-align the spoiler to cover up some scratch marks that happened when the spoiler was removed. Hope I've helped.

if i use double sided tape would the spoiler come off at high speeds?

No chance.


I have the M5 lip spoiler, and the trunlid finisher. Both use the same double-sided tape. It sticks like CRAZY. I actually made a mistake installing my finisher, and had to remove the tape and try again. It took me a half hour with a knife to get the finisher off. And then it took even more time with Goo Gone trying to get the adhesive cleaned away so I could try again.


Piece of advice. Do it right the first time. :thumbsup:

ACS uses double sided tape...

sounds pretty good to me....im thinking about adding the Alpina spoiler

I'm also looking to get a spoiler, found this on ebay. Says has the double sided tape. What do you guys think?

http://cgi.ebay.com/ebaymotors/Painted-BMW...sspagenameZWDVW

It's a replica of the ACS spoiler. You get what you pay for...

My understand that double-stick tape works for most of the aero add ons. I know that 3M makes a very good double stick tape. What do you guys recommend?

I've also been looking for a Hamman spoiler. I understand that ats77 is the source for Hamman parts, but I have no luck getting a response from him.