HD replacement spring for 35166.9004, meant for 500lbs additional weight on rear axle. If ran with out the proper amount of weight, too much lift will cause poor ride quality.
Front Adjustable Threaded Spring Perch to Accommodate Increased Loads and Maximum Clearance. ERO Off-Road Race Spring Equipped and Compatible.This Part Fits:YearMakeModelSubmodel2021-2024FordBronco