Rear Endlink Details and Tuning. After installing the sway bars I had to fix the perpendicular issue for the rear and front endlinks. I used Three washers in total between the way bar and top endlink bushing. I used the Kartboy washers on each side of the bushing. The other two washers were the Zinc Plated M12 Flat Washers and then I used a 3/8" Flat Washer where the bolt goes through the hole in the sway bar then the nut attaches. I also set the rear sway bar to the Firmest setting.