Car Speaker spacers for about 60 cents per foot. My honda fit has speakers that extend out the door about 3/4 of  an inch. Like any after market speaker you will likely have to cut the door or add a spacer. I cut the door thinking I would get a perfect flush fit until I rolled down my window and heard a clunk.

So this was my simple solution. Use rope you can buy at any hardware store for 60 cents per foot. It will maintain a great acoustic seal while holding up to the compression as you tighten the speaker down.

The rope will make a perfect seal but if you want to flatten it down or you may need 1.5 layers you can remove the hard rubber piece from the nylon braiding by pulling and twisting.


http://www.youtube.com/watch?v=Kdh8525ADDE