The Load Pro 35 kit is designed for full sized pickup trucks, vans, RVs, and sport utility vehicles. The kit contains 2 heavy duty leaf assemblies that run over both sides of the axle.
* Includes Mounting Kit
Hellwig's steel leaf helper springs are ideal for helping manage your load more efficiently. They are simple to install bolting on to your new or old factory rear leaf springs and require little or no maintenance.
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Owner installed on a 2006 Duramax 2500 HD long bed. Easy installation but I needed to buy an closed end wrench with a short handle to tighten some bolts because I did not have a deep socket. I carry a truck camper in the bed and the springs eliminated sagging, and "porpoising" on highways with bad expansion joints. The camper when fully loaded with propane, clothes, food, some water, extra battery, etc. weighs approximately 3300 pounds. The truck still has the original rear shocks. If the helper springs didn't do their job I was going to replace those. Now I am in no hurry to do that but will eventually to improve ride when bed is not carrying a load. I previously installed a heavy duty rear sway bar which definitely helped with side to side movements. The combination of the springs and bar have instilled confidence in trucks ability to handle tight mountain roads with a top heavy load of truck camper.