because they only chirp! Seriously, I don't know why every suspension manufacturer thinks it's okay to put those urethane bushings on anything. If they build the control arm from scratch they have the option to build it around the existing rubber bushing and then customers can buy the rubber bushing and not have to deal with squeaky urethane. Of course you can treat these with assembly lubricant and not chirp for 2-3 months. Wupti-doo. Then it's BABY BIRDS again. if you do not want toβ¦