This item includes:, 2 Timing Chain (2 require), 1 Tensioner not in set (left chain tensioner), 1 Tensioner not in set (right chain tensioner), 1 Guide Rail left (fixed left chain rail), 1 Guide Rail left (tensioning left rail), 1 Guide Rail right (fixed right chain rail), 1 Guide Rail right (tensioning right rail), Sprockets or Gears - are not included