Just install in the rear,it really made a difference. I went to a hardware store that had an assortment of replacement bolts.Brought the old ones and added the width of the lift( 1" in my situation was enough) and the plastic covers can be reinstalled.Consumer Reports even said the sitting...
Great idea. I am 5' 6" and always felt sunken into the seat cushion. I used plastic exterior limber , cut to fit and used longer bolts.Thanks for the idea, made a big difference