Hellwig Load Pro 35 Helper Spring | Rear Axle | 3500 lbs. Capacity

SKU HW3511-25301

The Hellwig 3511 Load Pro 35 kit is designed to give your truck up to 3500 pounds of load levleing capacity. Includes 2 steel leaf helper springs and 25301 mounting kit.

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Product Specifications

Location: Fits Rear Axle
Capacity:3,500 lbs.
Instructions: Hellwig 3511-25301 Helper Springs Instructions.
Note:Includes Mounting Kit 25301.

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The Hellwig 3511 Load Pro 35 kit is designed to give your truck up to 3500 pounds of load levleing capacity. Includes 2 steel leaf helper springs and 25301 mounting kit.

Product Specs for Hellwig 3511-25301

Location: Fits Rear Axle
Capacity:3,500 lbs.
Instructions: Hellwig 3511-25301 Helper Springs Instructions.
Note:Includes Mounting Kit 25301.
Manufacturers Part Number:3511-25301
MPN: 3511-25301

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Hellwig 3511-25301 Details

Hellwig Load Pro 35 Helper Springs

This Hellwig helper spring set features Progressive Spring Rate and Fulltime Spring Rate design, this spring is the workhorse of the Hellwig Spring line. With the Progressive design the vehicle must be loaded and its spring compressed to activate the Hellwig Spring, therefore as the vehicles load increases the Hellwig Helper Spring progressively increases its resistance to the load. In the Fulltime design the Hellwig Spring reacts immediately to the vehicles load, compressing very little as a load is applied to the vehicle.

Manufactured with heat treated ASTM 5160 alloy spring steel these units increase your vehicles level load carrying capacity up to the manufacturer’s Gross Vehicle Weight Rating. Designed to install on full size pick-up trucks and vans, this unit requires mounting hardware to accommodate 2 1/2" or 3" wide leaf springs. Ideal for helping manage your load more efficiently, these kits are easy to install and require little or no maintenance. Just “Set it and forget it”. The LP 35 is rated at 3500lbs level load carrying capacity, do not exceed the Gross Vehicle Weight Rating.

The Hellwig Load Pro 35 Series helper spring 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. A mounting hardware kit is included with these heavy duty helper springs.

Features & Benefits

Made with high-quality alloy spring steel.
Engineered for the heaviest loads.
Up to 3500 lb. level load capacity.
Heat-treated for strength and durability.
Recommended for 3/4 Ton and 1 Ton Applications.
4-Leaf Stack.
Progressive Rate Design is Fully Adjustable.
Factory ride is unaffected when vehicle is unloaded.
Includes mounting kit.

Vehicle Application Guide for Hellwig 3511-25301

The HW3511-25301 Hellwig Load Pro 35 Helper Spring | Rear Axle | 3500 lbs. Capacity is engineered to work with specific vehicles displayed below. Can't find your vehicle, or need assistance, please give us a call at 1-800-358-4751 or 1-989-755-0561.

Year	Make	Model	Vehicle Option	Installation Notes
2012	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads.
2011	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads.
2011	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Kit will fit dually models.
2012	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Kit will fit dually models.
2013	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Kit will fit dually models.
2013	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads.
2014	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads.
2014	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Kit will fit dually models.
2015	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads.
2015	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Kit will fit dually models.
2016	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models.
2016	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2017	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2017	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2018	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2018	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2017	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2018	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2019	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2020	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2020	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2019	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2019	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2020	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2016	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2020	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2019	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2018	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2017	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2016	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2022	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2021	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2022	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2021	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2024	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2025	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2026	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2023	Ford	F-250 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2026	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2025	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2024	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2023	Ford	F-350 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Must remove factory overloads. Includes Cab & Chassis models. Kit will fit dually models.
2021	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2022	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2024	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2023	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2025	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2026	Ford	F-450 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2021	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2022	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2024	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2023	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.
2025	Ford	F-550 Super Duty	Fits 2 Wheel Drive; Fits 4 Wheel Drive	Fits Cab & Chassis models. Do NOT use with factory overload springs. Includes dual rear wheels.

Customer Q&A - Hellwig 3511-25301

Ask A Question

Question:

What do the "Factory Overloads" look like?

Answer:

Factory overloads look like a helper spring that sits on top of your leaf spring pack. The factory overloads are typically one or 2 steel leafs that are on top of your factory leaf springs. Feel free to call us or email us a picture to truckspring@truckspring.com and we can help you determine if you have factory overloads.

Hellwig

TruckSpring is a warehouse distributor for Hellwig products and we have been installing Hellwig air spring kits, Hellwig sway bars and Hellwig steel helper springs kits at our shop for years at our Michigan repair facility. We have a great working relationship with Hellwig and are very familiar with all of their suspension products. Hellwig products are made in the USA and we highly recommend them.

The history of Hellwig Products Co, Inc. began in Kansas City, Kansas in the early forties. With son Donald by his side, Rudolph, " Ruddy" Hellwig, began designing and manufacturing "Helper Springs". The business was moved to Southern California in the mid forties and incorporated in 1946.

By the mid 60's the company's southern California location proved to be to small and Don moved the Manufacturing facility to its current location in Visalia, California. Throughout the years Hellwig products has developed innovative suspension products that help vehicles handle loads and control sway. Products include Anti-Sway bars aftermarket and O.E.M. Also the most popular and imitated load assist products ever introduced to the light truck aftermarket, the "Load Pro 25 Series".

With a third generation of Hellwig, Don's son Mark directing the business a whole new series of innovations is being introduced. Included in these innovations is the "Next Generation" of load assist springs the patented "Pro Series" line of springs. Plus, a unique adjustable feature on new Anti-sway bar designs. Hellwig is proud to introduce the "FastRack" motorcycle racking system for toyhaulers and light trucks. Now beginning its 60th year Hellwig Products continues to introduce new materials, processes and manufacturing techniques into its product lines.

For more information visit www.hellwigproducts.com

Hellwig Warranty

Limited Lifetime Warranty

On steel helper springs and sway bars

2 Year Limited Warranty

On Hellwig Air bag kits

What the Warranty does not cover

Damage from accidents, corrosion, improper installation, incorrect applications, overloading, and custom applications that are not specified under the OEM cross references. This warranty does not cover loss of freight, loss of profit, equipment, or personal downtime. Hellwig’s warranties are non-transferrable.

You can view the full details of Hellwig’s warranty here.