Firestone Ride-Rite Air Bag Helper Springs (pair) *No-Drill* 2011 GM 2500/3500 HD 4wd & 2wd Ride-Rite™ air helper springs mount between the frame and the suspension of light-trucks, vans, and motorhomes. The heavy-duty convoluted air springs will handle all leveling needs with load carrying capacities between 3,200-5,000 lbs per set*. NO DRILL KITS Look for many new no drill kits which utilize the factory holes and can be installed in half the time or less! These are designed to be fifth wheel and gooseneck hitch compatible. Ride-Rite™ air helper springs will: Kit Contents: Quality Standards Level the vehicle front-to-rear & side-to-side Adjustability 5-100 p.s.i. Stabilize the vehicle while loaded Maximize vehicles load carrying capacity Air Springs Air Line Fasteners Detailed Instructions Upper and Lower brackets Inflation valves (manual inflation) Push-to-Connect air fittings Over 1 million cycle life test Each kit is weighed to ensure component count ISO Certified Each air spring pressure tested before leaving the factory.