EDIT: part has been updated with tighter dimensionsa rear bumper for the 1/10 scale traxxas slashbumper arms can be found here https://www.youmagine.com/designs/traxxas-slash-bumper-arm-bracesupport brace for the rear bumper armshttps://www.youmagine.com/designs/traxxas-slash-bumper-arm-brace