Hellwig · New
Hellwig 11-21 Ford F-250 Load Pro- Up To 3500lb Level LC 4 Leaf Stack Helper Spring w/o Mounting Kit
MPN 3511 · Store SKU hwg3511
Supplier stock checked 11/7/2026, 8:34:45 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The Hellwig LP-35 Helper Spring set the standard for all other aftermarket helper springs. Featuring a Fulltime Spring Rate design it is the workhorse of the Hellwig Spring line. This is ideal for fleet applications or vehicles that consistently carry a heavy load day in and day out.ATTENTION: MUST PURCHASE LP MOUNTING KIT FOR INSTALLATION. IF EQUIPPED WITH FACTORY CONTACT OVERLOAD SPRINGS, CHECK VEHICLE FITMENT ABOVE FOR SPECIFIC INFORMATION ON YOUR YEAR AND MODEL VEHICLE. The Hellwig LP-35 Helper Spring set the standard for all other aftermarket helper springs. Featuring a Fulltime Spring Rate design it is the workhorse of the Hellwig Spring line. This is ideal for fleet applications or vehicles that consistently carry a heavy load day in and day out. LP-35 Heavy Duty Load Leveling Helper Springs Ford 11-25 F250/350 2WD/4WD, 17-25 F450 2WD/4WD Pickup, 16-25 F250/350/450/550 Cab & Chassis 2WD/4WD Requires PN[25301] mounting kit: Do Not Use w/Factory Overload Contact Springs or use 9703 LP-35 HD Load Leveling Helper Springs Ford 11-26 F250/350 2WD/4WD, 17-26 F450 2WD/4WD Pickup, 16-26 F250/350/450/550 Cab & Chassis 2WD/4WD Requires PN 25301 mounting kit: Do Not Use w/Factory Overload Contact Springs or use 9703- SRW ONLY LP-35 Heavy Duty Load Leveling Helper Springs Ford 11-22 F250/350 2WD/4WD; 17-22 F450 2WD/4WD Pickup; 16-22 F250/350/450/550 Cab/Chassis 2WD/4WD Requires PN25301 mounting kit: Do Not Use w/Factory Overload Contact Springs or use 9703 Not Applicable for Vehicles Equipped w/ Load Leveling Sensors LP-35 Heavy Duty Load Leveling Helper Springs
Manufacturer fitment & guides
Check 3511 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y