I actually used some of the left over strap from the loading rachet-straps I bought to tie the car down with to hold the duct. 3" wide and stronger than tape. I the put 3" long bolts on the steering arm on both sides, leaving about 2" sticking out, to hit the stop plate on the lower control arm. This stops the wheel from turning too much and hitting the ducting. Works perfectly. Gives me all I will ever need on the track.