After my Cobra intake install I had a hanging idle, so I did some searches on it and read about the restrictor plate for the IAC. It seemed everybody that used it loved it, so I had a couple made. I installed it today and WOW what a difference. My major changes were in start up and shifting, not so much in neutral revving. The car starts and settles a lot faster. Between shifts is the best, it seems like the car starts to pull before you get back into the gas. Between this and a mechanically setting your idle our cars idle issues can be dealt with! I would recommend this plate to anybody. I work with two guys that have Mach 1’s they are also going to try it because Mach 1’s are know for a hanging idle.