step 1: use painter tape and tape your car 1st before dry fit to avoid scratching the paint.
step 2: dry fit and move around until you find the desired position. 1 hole should line up to the existing screw.
step 3: put 3M tape on, preferably 1 long one instead of a lot of short ones.
step 4: remove the painter tape on the car, clean the surface well, use alcohol and let dry if you have it.
step 5: put on a glove to avoid letting your sweat touch the surface. unscrew the screw, fit the splitter, screw it in, just a little bit, not too tight so you can move the splitter around. position to the desired position you had before. remove 3M tape, and use pressure to push down. when secured, screw the screw in tightly.
step 6: enjoy and drink a beer
10' E92 M3 6MT