In order to choose between the Dexter E-Z Flex Suspension Kits, part # K71-652-00 and part # K71-653-00 you simply need to measure the existing equalizers. If they measure 5-1/2" or close then you'll use part # K71-652-00 but if they measure 7-3/4" or close then you'll use part # K71-653-00. view full answer...