Originally Posted by 1cleanm3
I wanted to clarify would your 3m already installed on the lip plus the oem bumper screws hold the lip just fine on the m3 (high speeds,etc).
As long as you follow proper installation techniques to install the spoiler the provided 3M tape and oem screws will hold it on just fine for daily driving. If you are uncertain how to install the lip we can recommend you to a few facilities or will be happy to walk you through it by phone even. For those doing extreme high speed runs or track duty we do recommend putting 5-7 bolts along the front edge neat the tape as the Lip is a functional piece of aero on the car.
We have many local installs and track customers i know have taken their cars to high speeds and at the track with no problems. From time to time some tape doesnt stick, or mabe it didnt get centered perfectly during install, but usually this can be seen within the first day if something like that happens. We also provide special adhesive promotion pads with our lips as well to help the tape stick as best as possible.
Here is a link to a few photos showing installation steps of a lip here: