Add assistance to your factory overload springs with Hellwig's Big Wig Contact Helper Springs. Get help sooner with the contact helper, as the truck is loaded, the Hellwig Big Wig connects with the factory contact pads providing better support and less sag for heavy loads. When in contact, the extra Hellwig leafs stiffen the overload springs decreasing the sag of the vehicle in a loaded condition. Hellwig contact overload assist springs mount directly to the factory contact springs for easy install and better load support to increase your truck's level-load carrying capacity. In normal use, they leave the ride and performance unchanged.Fits: 2020-2026 Chevrolet Silverado/GMC Sierra 3500 HD, 1999-2016 Ford F-250 Super Duty, and 2004-2007 Ford F-350 Super Duty with single rear wheels

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