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Carli Suspension Ford 17+ F250/350 Leveling System - CS-FLVL-SIG-17-GAS

Carli Suspension



Review description to confirm additional fitment details

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The Leveling System was designed for people seeking a leveled vehicle with more performance and ride quality than a generic spacer lift. The included, front, Carli Signature Series Shocks are longer to accommodate the extended travel. When designing the shocks, Zinc plating, Clear Coat for corrosion resistance and quality bushings were a must; finished off with boots to protect the shafts, we back them with a limited lifetime warranty to ensure their quality is as unbeatable as their ride quality at this price point.

The truck will sit 3.5” higher in the front and have more wheel travel thanks to the lighter rate Carli Coil Springs. Extended, Stainless Brake Lines firm up braking and ensure there is enough line for the newfound travel. To round off the front end, we include Caster Shims to tighten the steering. We recommend adding an Adjustable Track Bar to center the front axle; for those that do not wish to, we include our High-Clearance Bump Stop Drop to keep the springs clear from the contacting the factory bump stop given the slight driver’s side shift of a leveled Super Duty without a track bar. The front Sway Bar Geometry will need to be addressed with your choice of a Sway Bar Drop Bracket (more economical, maintains the factory Sway Bar End Links) or our Extended Sway Bar links – a FAR more robust option. For those seeking the most possible ride quality, we offer our full replacement Torsion Sway Bar that lightens the most neglected spring rate – the factory sway bar. From the Torsion Sway bar upgrade, one can expect a far more compliant feel and increased articulation with only slightly more body roll.

This system will not achieve a proper rear high stance without the installation of the add-a-pack; it will sit slightly rear low with no rear option added! The F250 Add-a-Pack equipped systems are a nice improvement over stock; the F350 with the Add-a-Pack is still very stiff in the rear as the main pack doesn’t move much unless loaded. For this reason, we do not recommend the Add-a-pack on an F350 or Tremor (as they all have F350 springs); you’re best to leave the factory springs unmodified. One can install the 3″ factory rear block for a leveled stance but rear ride quality will not be optimized (Factory Block PN: HC3Z-5598-A and HC3Z-5598-B). The Add-a-Pack installs in place of the lower, factory overload spring effectively making the factory leaf spring pack progressive in nature. In the 2020 platform, the factory 2″ block is eliminated with the installation of the Add-a-Pack; thus, axle wrap and wheel hop are non-existent. A rear bump stop drop is included to bridge the distance lost by removing the factory block.

Payload capacity is maintained and the rear end becomes a touch softer while being far more planted and predictable. The custom tuning in the rear Signature Series Shocks is optimized to control the combination of our Progressive Add-a-Pack combined with the factory main pack; it’s for this reason we advise against upgrading to the Full Progressive Spring Pack (too much rebound valving for a lighter rate spring).

Wheel and Tire: Factory Wheels SHOULD NOT be run with oversized tires. They’re known to rub the radius arm, sway bar and most concerning – Brake Lines. Factory tires and factory wheels will work without issue but we DO NOT recommend running oversized tires on factory wheels. On our 3.5” Ford Systems, we recommend 17”-18” wheels, no more than 9” wide with 5.5” of backspacing with Carli Fabricated Radius Arms or 5” Backspace with factory arms; 5” will require a bit more trimming. Tires, 37×12.5” will fit with some trimming; 35” will likely fit without trimming. The more rubber, the better the small bump compliance will be at proper inflation pressures. The ride will firm up as you go larger in wheel diameter.

Base Kit Includes:

  • 2.5" Lift, Linear Rate Ford Leveling Coils - CS-FLC-11-GAS

  • Ford Signature Series FRONT Shock Package, - LVL CS-FSIG20SPKG-FRONT-LVL-05

  • Extended Braided Brake Lines, Front - CS-FORDBBL-LVL-17-F

  • 2° Caster Correction Shim - CS-FCASTERSHIM-2.5

  • High-Clearance Bump Stop Drops, Front - CS-FBDF-2.5-17


Sway Bar (required)

The Leveling System will ride best with the Torsion Sway Bar. Maintaining the factory sway bar through use of the Sway Bar Drops or Extended Link Kit is only recommended for customers with snow-plows, in-bed campers or who are constantly hauling to the capacity of the truck.

-Sway Bar Drop Brackets, Leveling

  • Corrects Sway Bar Geometry in Carli Leveling Suspensions

- Sway Bar End Link Kit, 2.5"/3.5" Lifts

  • Combines End Links and Drop Brackets For Perfect Sway Bar Position

  • Extended Length to accommodate Leveled Trucks

  • 17-4 Stainless Steel, Greaseable and Fully Rebuildable

  • Excellent Articulation

  • Compatible with 2.5″ & 3.5″ Suspension Systems

- Torsion Sway Bar - WITH End Links, Leveling

  • Direct Fitment to Carli Leveling Lifts

  • Replaces Immobile Factory Sway Bar with Custom Torsion Bar

  • Huge Ride Quality Improvement

  • Includes Drop Brackets and Sway Bar Links

Rear Shoocks (optional)

Tuned to the factory leaf springs, these rear shocks balance the rear-feel to match the custom tune in your newly leveled Super Duty.

  • 2.0" Carli Signature Series Shocks, Rear Pair

  • Carli Custom Tuned

  • Clear Coated Bodies for Corrosion Resistance

  • Boots Included for Shaft Protection

  • 12" Rear Wheel Travel

Adjustable Track Bar (optional)

Centers the axle at the new ride height utilizing a stronger suspension/steering link to prevent death-wobble and improve overall tracking and steering feel.

  • Massive Steering Upgrade

  • Vibration Damping CUB Joint

  • Fully Rebuildable

  • NOT for use on stock-height Trucks.

Rear Leaf Spring Options (optional)

  • Smooth, Progressive Design

  • Supplied with Bump Stop Drops, U-bolts and hardware

  • Pairs to Carli Leveling Lifts, provides 1/2"-1" high rear stance

  • Eliminates the Factory Block

  • Load capacity is maintained, ride quality is improved

Leaf Spring Shackle (optional)

Much of the jarring ride of the Super Duty rear can be attributed to the factory vulcanized bushings in the leaf spring pack and shackle. The factory shackle is very strong BUT the design is not conducive to a smooth ride. The Carli shackle is constructed of 1/4″ American cold-rolled steel. The mid-length gusset ensures no deflection while the serviceable bushings offer a far superior ride to the bind of the factory bushings.

  • Greasable and Rebuildable

  • Far Better Ride than Factory Shackle

  • 1/4" Steel Construction

  • Fits Factory and Carli Springs

2° Pinion Shim (optional)

  • When modifying the rear leaf springs (add-a-pack or Full Spring Pack) of the 2017+ Super Duty platform, there's a small chance you'll induce a driveline vibration around 70mph when under power from the rear driveline. These pinion shims will correct the angle to 4°-5°, ideal for our lifted applications. Although these will not be "required" on every truck, we've found the 4°-5° spec to be superior in our applications and these are FAR easier to install initially than correctively.

High Mount Steering Stabilizer (optional)

  • Long Lasting Performance and Appearance

  • Bolt in Replacement for OEM Stabilizer

  • Works on leveled and lifted trucks ONLY

Low Mount Steering Stabilizer (optional)

  • Custom Valved for Larger Tires, Adjustable Nitrogen Pressure

  • Includes Differential Guard and Clamp

  • Combines with High-Mount Stabilizer for Opposing Setup

  • Optimized for Carli 2.5"-5.5" Systems

Adjustable Radius Arms (optional)

Icing on the cake, these arms add Additional Tire Clearance, Limit Strap Protection for your Front Shocks, 1/4" Boxed Steel Constructions, Serviceable 17-4 Stainless Spherical Bearings and Adjustable Caster Correction up to 3.5° over stock specs to leave Death-Wobble in the rear-view.

  • 1°-4° of adjustable Caster correction

  • 3/16 Construction, Fully Internal Gusseted with 1/2" Additional Tire Clearance

  • Limit Straps Kit Included

  • Serviceable 17-4 Stainless Spherical Joint at Frame Connection for longevity and bind free Cycling

  • Combines with Radius Arm Drop Brackets for 4.5"-5.5" Carli Systems

Please contact us if you wish to learn more about the warranty for this product.

Please contact us if you wish to learn more about the warranty for this product.

Please contact us if you wish to learn more about the warranty for this product.

Please contact us if you wish to learn more about the warranty for this product.


No installation documents are available for this product. Please contact us if you require installation assistance.

No installation documents are available for this product. Please contact us if you require installation assistance.

No installation documents are available for this product. Please contact us if you require installation assistance.

No installation documents are available for this product. Please contact us if you require installation assistance.

Review Description and More Details for additional fitment specifications such as Engine, Cab Length and Bed Length (if applicable).

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