I actually bought two sets of rear dampers, there is no way they would fit up front without a taller shock tower. I'm using the taller Fyber Lite tower up front and its fine. I think someone mentioned that they had to use spacers up front to make them work with the stock tower. I also raised the rear shock tower, i think if i kept it in the stock location, i would have needed at least a 2mm spacer. The stock CVA shocks shouldn't need any internal spacer unless you're using different springs. I believe someone also mentioned that their front CVAs were bottoming out before the chassis touched, mine never bottomed out though..