New seald old stock box tatty see photos The GATES T39430 Belt Tensioner is designed for use in CITROËN, DS, OPEL, PEUGEOT, and VAUXHALL vehicles. This timing belt tensioner set includes a tensioner and is compatible with various OEM cross-references such as FEBI BILSTEIN, SASIC, CONTINENTAL CTAM, SKF, and more. The outer diameter of the tensioner is 55mm, and it is a crucial component for maintaining proper tension in the timing belt system.