Billet Proof Designs is a Collegeville, Pennsylvania maker and supplier of aftermarket motorcycle and powersports parts, with in-house machining focused on fabrication hardware such as welded bungs and tabs. Founded by Damian and Dan more than 15 years ago, the small team builds and rides with the products it provides, bringing hands-on motorcycle experience to a business rooted in the riding community. Its steel, aluminum, and stainless-steel bungs are made in the USA.