UMI Performance Boxed rear lower control arms / trailing arms for GM B-Body's: for 1959 to 1964. I purchased them for an Impala. Should also fit Biscayne, Bel Air, Catalina, Dynamic 88, Buick Lesabre, Invicta, Bonneville, Catalina (please do your own research). They have greasable polyurethane bushings with zero fittings to eliminate squeaking. Ordered for a project that has been sold. These lower rear control arms are new and have never been installed. UMI Performance. Currently for sale on the UMI Performance website for $349+$20 for shipping and tax. Approximately $394 out the door. Small scratch from storage. These are absolutely brand new. UMI Performance part number 3650.