Originally Posted by
LukaMcCloud From what I've read from when the M3 lip got really popular was that you have to cut it in half, trim to the necessary length, and then seam together. The classic guys are running this as a roof spoiler not a deck lid spoiler.
Lance
The one I got didn't need to be cut in the middle. It was urethane and flexible, so we cut an end off it, then shaped it with a sander to match the other end.
I don't have pics of the process, unfortunately.