Carli Suspension Heavy-Duty Leaf Spring Kit | 2017–2026 Ford F-250/F-350 SRW

Carli Suspension Heavy-Duty Leaf Spring Kit | 2017–2026 Ford F-250/F-350 SRW | SKU: CS-FFSP-17-HD

Is This for You?

This kit is for the 2017–2026 Ford F-250 or F-350 SRW owner who needs improved rear load control, tow stability, and reduced rear sag under heavy payload. This is a rear leaf spring replacement — not a lift system. If you have a Ram 2500/3500, stop here — Ram-specific leaf spring kits are listed separately. If you have an F-350 DRW (Dually), stop here — this kit does not fit DRW applications. If you want a complete front and rear lift system, see the Dominator or Backcountry system listings.

The Result

Progressive-rate rear leaf pack engineered for the 2017–2026 Super Duty SRW — improved tow stability, reduced rear squat under load, and better overall ride quality when hauling. Carli-engineered spring rates matched to the Super Duty’s chassis and payload ratings.

Verified Fitment (OFAS Standard)

• Ford F-250 Super Duty SRW: 2017–2026
• Ford F-350 Super Duty SRW: 2017–2026

Does NOT fit: F-350 DRW (Dually) — different rear axle and spring configuration. Does NOT fit 2016 or earlier F-250/F-350. Does NOT fit F-150. Confirm SRW vs DRW before ordering.

System Specifications

• SKU: CS-FFSP-17-HD
• Brand: Carli Suspension
• Kit: Heavy-Duty Rear Leaf Spring
• Spring Rate: Progressive — Carli-engineered for Super Duty SRW
• Position: Rear
• Application: 2017–2026 Ford F-250/F-350 SRW

Master Kit Components

• Carli Heavy-Duty progressive-rate rear leaf spring pack (pair)
• Confirm full kit contents via contact form or Carli spec sheet

Installation & Fabrication Notes

• Professional installation recommended: Rear leaf spring replacement requires proper jack stands, spring compressors, and torque tools.
• Torque specs: Follow Carli installation manual torque specifications for all U-bolt and shackle hardware.
• No alignment required: Rear leaf spring replacement does not affect front alignment. Confirm with your installer.
• Break-in period: Allow 500–1,000 miles for springs to settle to rated height.

Wheel & Tire Fitment

This is a rear spring replacement — does not change rear lift height significantly. Confirm tire clearance with your installer if running oversized tires. Submit your setup via the contact form for a recommendation.

Is your Super Duty a 2017–2026 F-250 or F-350 SRW? What payload and tow setup are you running? Submit via the contact form and we’ll confirm fitment before it ships.