Leaf Springs & Suspension Authority Since 1965!

Heavy Duty Coil Springs for 71-93 D300/350 except 3800 & 4000 lbs front GAWR, 71-77 B300/350, 78 B300 except 8200 & 9000 lbs GVW - 2025 rate per coil

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Sold as a pair.

Super Duty Coil Springs are custom designed to give you 1000 pounds of additional load handling capability per pair with a maximum of 1/2 inch increase in ride height at zero additional load.  Coated with an attractive silver-gray baked on epoxy finish.  Super Duty Coil Springs are the only practical helper spring alternative when shock absorbers are mounted inside the coil spring and are an excellent choice for vehicles equipped with diesel engines or snow plows.  Super Duty Coil Springs also require no maintenance making them an excellent load handling solution for fleet vehicles, pickups, vans and motorhomes.  Super Duty Coil Springs improve the handling and ride quality of heavily loaded vehicles, thereby reducing driver fatigue and increasing safety and efficiency.