Hellwig 61912 Helper Spring Kit for GM

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2500 lbs. Level Load Capacity Progressive rate leaves do not effect ride when unloaded Load & Sway Control in one spring Heavy duty plated hardware and simple bolt on installation Made in the USA This increases your vehicles level load carrying capacity up to the manufacturer's Gross Vehicle Weight Rating. With its progressive rate design this helper spring system enables trucks and vans to carry loads with more control and stability. As your load increases this spring automatically increases its rate to resist sagging and tail dragging. Pro Series is packaged in one box which includes all the heavy duty hardware and installation instructions, this unit can be installed in a professional shop or in your own drive way using tools you already have. Made in the USA. Show more