Carli Spec 4.5" 2017+ Super Duty Commuter System
2017-2022 Carli Spec 4.5 inch Ford SuperDuty Commuter System Diesel
The Super Duty Commuter 2.0 system is designed for people seeking the best on-road ride quality that don’t plan to off-road their vehicle beyond low-speed trail driving. Utilizing Carli SPEC 2.0″ Diameter, Internal Reservoir shocks, we’ve developed a tune that delivers all-around comfort and ride quality designed for on-road, in town, highway, and towing/hauling.
The mono-tube, internal reservoir, Carli SPEC 2.0 boasts 6063 Aluminum construction, anodized body for corrosion resistance, 5/8″ hardened steel chrome plated shaft, full serviceability & rebuildability and are built with 1-peice bushings in the 6061 billet rod-ends. These shocks are spec’d with a premium 5WT oil to balance lubricity, consistent damping and the widest available range in temperature variation. We back these with a 1-year warranty, serviced by Carli.
The truck will sit 4.5” higher in the front and have more wheel travel thanks to the taller, Progressive Rate Coil Springs. Radius Arm Drop Brackets reset the pivot point and keep the travel linear for the best ride while the Sway Bar Link & Drop Brackets Kit resets the sway bar engagement point. The End Link Kit is listed as an “option”, but it’s necessary to run. We plan to release a Torsion Sway Bar in the near future so the end-link options were pulled from the base kit and made selectable in anticipation of the second option. Bump Stop Drops protect the shocks from over-compressing, the Adjustable Track Bar centers the front axle and 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.
NEW for the Carli-SPEC: In the previous version, we optimized the Commuter for the add-a-pack while recommending against our full replacement leaf springs. With the new shocks and tuning, the rear can now be outfitted with a replacement Full Progressive Spring Pack (reduces capacity to a “light” ¾-ton) or factory leaf-pack modifying Progressive Add-a-Pack (maintains factory payload capacity and pairs with the included Carli Fabricated 2” block)!
This is where the F250 and F350 are a bit different. Since 2008, the main spring packs on these two trucks is different; the F250 has a lighter rate spring pack than its 350 counterpart. 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. We recommend the Full Replacement Leaf Spring packs for both trucks but especially the F350 given the super-stiff factory springs. If capacity is a concern, the Full Progressive Leaf Springs can be supplemented back to the factory capacity of a SRW F350 with the addition of our Long-Travel Airbags. The Full Progressive Leaf Spring Pack will shift the axle slightly forward in the wheel well to ensure maximum tire clearance for a 37” M/T at full compression.
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 4.5” Ford Systems, we recommend 17”-18” wheels, no more than 9” wide with 5” of backspacing with a 37”, E-Rated Tire. 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:
- CS-FMRC-05 - 4.5" Lift, Multi Rate Ford Coils
- AS-F45SPKG-CS20IFP-A - Carli Spec Ford Commuter 4.5'' Shock Package
- CS-FRAD-17 - 2017 Radius Arm Drop Brackets
- CS-FORDBBL-4.5-17 - Extended Braided Brake Lines
- CS-FCASTERSHIM-2.5 - Caster Correction Shim
- CS-FBDF-4.5-17 - High-Clearance Front Bump Stop Drops
- CS-FPRB-17 - Ford Adjustable Track Bar
Fitment Guide:
- 2017-2022 Ford Superduty F250 / F350 4X4 Diesel
Base Kit Part Number
- CS-F45-COM-CS-17
Recommended Rear Lift Options
It is HIGHLY recommended that you do add the add-a-pack to your kit in order for the kit to ride and perform as expected along with acheiving the proper stance.
- CS-FPAP-17 - Progressive Add-a-Pack & Bump Drop
- Built in the U.S.A. By Deaver Leaf Spring
- Smooth progressive design
- Supplied with U-bolts, 2" blocks, and hardware
- Provides 2.0" of lift
- The O.E.M. load capacity is still maintained while improved ride is achieved
