Thanks for the compliments everyone, these spoilers are easy to mount due to the intentions in the spoiler where the lower valance is made, all it takes is either 1-4-20 bolt and Washer, nutserts, or pretty large rivets(not my favorite) and drill both the spoiler and the valance and put the bolts on and you are done, should be no more than an hours worth of work. these will fit a Duster, but the fabrication of how to mount it for now is up to the customer. I am trying to work on one for a Duster direct, it will hopefully happen in the next few months.