The Hellwig EZ-990 Medium Duty Helper Spring kit is great for medium duty loads. Simply mounts under the factory axle U-Bolt plates to help restore sagging springs and stabilize your vehicle. These helpers come as a pair and have a million mile warranty.
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Great product, I can haul a pallet of water 2000 Lbs yet the truck height isn't to high when empty,
I added these springs to my 1/2 ton 2011, Crew Cab, 2 wheel drive, Chevrolet Silverado. I also added a fifth wheel to my truck and have been pulling around a 32 foot fifth wheel travel trailer with no problems. I will say that my motor, gearing, and tranny aren't equipped to haul a 10,000 lb trailer but my suspension sure is. As a matter of fact the camper sits better on my truck then it does my fathers F-250. Easy install and they look good too.