Hellwig 2017 Helper Air Springs for GM 2500/3500 Fits GM: 2011-2015 2500/3500 HD Pickup 2wd/4wd incl. Dually 2600# bags (5200# capacity total) Bags larger than the competition for a smother ride and more capacity Easy, bolt on installation; Includes all pieces necessary to install (including air line and schrader valves) Heavy duty, powder coated steel brackets