The chrome "dust caps" (as opposed to rubber weather seal)? If so, look all around the base of the chrome cap. Usually hidden toward the back or inside, you'll see a notch. pop it off there with a small screwdriver. The new chrome fluted caps I installed with my chrome lowers kit fit differently; they overlap the tops of the lowers, instead of butting against the machined step in the top of the lower. These kind have an allen set-screw, instead of snap into place.