Taken from
here 1. Remove your OMP Front Strut Tower Bar from your strut towers and remove the 2 end plates.
2. Bring the 2 end plates to a machine shop and tell them to bore out the holes to a diameter of 82mm.
3. Reassemble OMP bar and bring it to a Powder Blaster to strip the bar, then bring it to a Powder Coat Painter to repaint the bar to whatever color you want.
4. Reinstall the OMP bar back onto the strut towers.