2005–2026 Ford F-250/F-350 4WD Diesel Carli Progressive Front Coil Springs – 4.5"/5.5" Lift
Upgrade the ride quality and suspension performance of your Super Duty with the Carli Suspension Progressive Front Coil Springs. Designed specifically for diesel-powered Ford F-250 and F-350 4WD trucks, these multi-rate coils deliver improved ride comfort, better suspension control, and increased bottom-out resistance both on and off-road.
Unlike stiff factory-style replacement springs, Carli’s progressive-rate design provides a smooth initial ride over rough roads and highway chatter while transitioning into a firmer secondary rate during aggressive suspension travel. The result is a more controlled, comfortable ride without sacrificing capability.
Key Features
- Progressive multi-rate spring design for improved ride comfort and suspension control
- Provides approximately 4.5" lift on 2005–2019 models
- Provides approximately 5.5" lift on 2020–2026 models
- Designed specifically for diesel-powered 4WD Super Duty trucks
- Shot-peened and pre-set for long-term durability and sag resistance
- Durable black coated finish for corrosion protection
- Side-specific coil design for optimized handling and performance
- Helps prevent harsh bottoming during heavy suspension cycling
- Excellent upgrade for lifted trucks, towing setups, and off-road applications
Vehicle Fitment
Fits Diesel 4WD Models Only
- 2005–2026 Ford F-250 Super Duty 4WD Diesel
- 2005–2026 Ford F-350 Super Duty 4WD Diesel
Not designed for gas engine trucks
Ride & Performance Benefits
These coils are engineered to dramatically improve overall ride quality while maintaining excellent load support and suspension stability. The progressive spring rate allows the suspension to stay compliant during normal driving while increasing resistance deeper into the travel range.
Perfect for:
- Daily-driven lifted trucks
- Heavy-duty towing applications
- Off-road and overland use
Construction & Finish
These coils are manufactured using premium-quality spring material and undergo a shot-peening and pre-setting process to maximize strength and longevity. A durable black coated finish helps resist corrosion and keeps the springs looking clean for years of use.
Installation Notes
- Front coil springs only
- Professional installation recommended
- Alignment required after installation
- Intended for use with properly matched suspension components
What's Included
- (2) Progressive Front Coil Springs
- Installation instructions
