guys, another solutions is just getting double sided tape (not the regular one but heavy duty one) and taping it on to the bumber. instead of drilling holes. So when you need it on, you can have it on. if not, you can just remove it and there will be no permanent damage to the bumper i.e. holes. haha. Thats what we do in singapore. So let me know if you have any questions.
2008 AW/BLK M3 6MT / Eisenmann Race / H&R / HID Angels / 3D Front & Rear Lip / UUC SSK / TE37 / Turner Pulleys / 4.10FD & 2 Clutch Salisbury Diff / Escort 9500ci