It says the are double adjustable with 576 differnt choices. That part number on there website says they are double ajustable. But are there 24 Clicks on the rebound and compression or is it smooth settings. ThanksJust FYI....the ones you listed from Summit are Single adjustables. the doubles have 24 valve settings on compression and 24 on rebound. I don't have a Mustang, but I do use them on my Camaro. Some folks don't like them, I have had nothing but good luck out of them on my car.