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    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    • Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520
    Sale!

    Hellwig 01-07 Ford F-350 SD Load Pro- To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit | HWG3520

    Vendor: Hellwig
    Part Number: 3520
    Save $195.06
    Sale Price $455.22 Regular Price $650.28

    In Stock

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    This Hellwig Load Pro helper spring adds up to 3500lbs of level load capacity to the 01-07 Ford F-350 SD, helping the truck sit level and stay stable under heavy loads and while towing. It bolts onto the factory leaf springs and is tunable through the U-bolts, so support can be adjusted as tow and haul needs change. This spring is sold without a mounting kit.

    • Load capacity: up to 3500lbs level load capacity
    • Series: Hellwig Load Pro
    • Install: bolts onto the factory leaf springs, tunable via U-bolts
    • Note: sold without a mounting kit
    • Warranty: Hellwig limited lifetime warranty
    • Part number: HWG3520

    Installation Instructions (PDF)

    Vehicle Applications

    This part fits a wide range of vehicles. See the full fitment list below.

    Year Make Model Submodel
    1994-1996 Dodge Ram 1500 Base
    1997-2000 Dodge Ram 1500 Laramie
    1997 Dodge Ram 1500 LT
    1997-2000 Dodge Ram 1500 Sport
    1997-1998 Dodge Ram 1500 SS/T 5.9L
    1997-2000 Dodge Ram 1500 ST
    1997-2000 Dodge Ram 1500 WS
    1994-2002 Dodge Ram 2500 Base
    1994-2002 Dodge Ram 3500 Base
    1977-1978,1983-1986,1997,1999 Ford F-250 Base
    1977-1982,1987-1992 Ford F-250 Custom
    1995-1996 Ford F-250 Eddie Bauer
    1997,1999 Ford F-250 Lariat
    1977-1978 Ford F-250 Northland
    1977-1981 Ford F-250 Ranger
    1978-1981 Ford F-250 Ranger Lariat
    1977-1981 Ford F-250 Ranger XLT
    1995-1996 Ford F-250 Special
    1982-1997,1999 Ford F-250 XL
    1982-1983 Ford F-250 XLS
    1977,1983-1984,1993-1997,1999 Ford F-250 XLT
    1982,1985-1992 Ford F-250 XLT Lariat
    1997 Ford F-250 HD XL
    1997 Ford F-250 HD XLT
    2004-2007 Ford F-250 Super Duty Harley-Davidson Edition
    2004-2007 Ford F-250 Super Duty King Ranch
    1999-2007 Ford F-250 Super Duty Lariat
    1999-2007 Ford F-250 Super Duty XL
    1999-2007 Ford F-250 Super Duty XLT
    1983-1986,1997 Ford F-350 Base
    1980-1982,1987-1992 Ford F-350 Custom
    1995 Ford F-350 Eddie Bauer
    1980-1981 Ford F-350 Ranger
    1980-1981 Ford F-350 Ranger Lariat
    1980-1981 Ford F-350 Ranger XLT
    1995-1996 Ford F-350 Special
    1982-1997 Ford F-350 XL
    1982-1983 Ford F-350 XLS
    1983-1984,1993-1997 Ford F-350 XLT
    1982,1985-1992 Ford F-350 XLT Lariat
    2004-2007 Ford F-350 Super Duty Harley-Davidson Edition
    2003-2007 Ford F-350 Super Duty King Ranch
    1999-2007 Ford F-350 Super Duty Lariat
    1999-2007 Ford F-350 Super Duty XL
    1999-2007 Ford F-350 Super Duty XLT

    FAQ

    How much load capacity does this add?

    Up to 3500lbs of level load capacity.

    What does a helper spring do?

    It helps the truck sit level and stay stable under heavy loads and while towing, reducing sag.

    Is it a bolt-on?

    Yes. It bolts onto the factory leaf springs and is tunable through the U-bolts to match your load.

    Does it include a mounting kit?

    No. This spring is sold without a mounting kit.

    Is it warrantied?

    Yes. It is backed by Hellwig's limited lifetime warranty.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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