Bumpstops Bumpstops Bump Stop, Universal 39mm x 78mm x 13mm - BS004 Universal polyurethane bump stop. Diameter = 39mm Height = 78mm Bore = 13mm Please click on the instructions link for drawing - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!