Carli Signature 2.0 IFP Leveling Shock Package | 2005–2026 Ford F-250/F-350 Diesel 4WD

Is This for You?

• You're running Carli leveling springs (or ordering them now) and need the matched shock package — not a universal fit, a system-matched damper set built around Carli's spring rates.
• You tow heavy, haul heavy, and drive daily on a 6.7L Powerstroke — and you're done with shock fade on long pulls or washboard roads.
• You want front and rear damping dialed together — FSP-valved rears matched to Carli progressive leaf packs, IFP fronts matched to Carli lift springs.

The Result

• Consistent damping force across repeated high-load impacts — no fade, no aeration.
• FSP (Full Spring Pack) rear valving calibrated specifically for Carli's progressive rear leaf packs.
• 2.5" front lift on 2005–2019 platforms; 3.0"–3.5" on 2020–2026 platforms.

The Internal Floating Piston (IFP) design physically separates the oil charge from the nitrogen gas charge inside the shock body. On a conventional monotube or twin-tube shock, aggressive cycling — repeated hard hits, sustained high-speed off-road, or long towing runs — causes oil and gas to mix, increasing fluid temperature and degrading damping consistency. The IFP eliminates that failure mode entirely. The 2.0" anodized aluminum body increases oil volume over a standard 1.5" shock, which directly extends the thermal ceiling before fade onset. The 5/8" hardened, chrome-plated shaft resists side-load deflection under the elevated unsprung weight of a diesel Super Duty — critical on a platform where front axle weight alone exceeds most half-ton curb weights. FSP valving on the rears is not a generic "heavy duty" tune — it is specifically mapped to the spring rate curve of Carli's progressive rear leaf packs. Running this shock against non-Carli rear springs will produce an unbalanced damping ratio and degrade both on-road compliance and off-road body control.

Audit Table

Kit Contents

• (2) Front Signature Series 2.0" IFP Shocks
• (2) Rear Signature Series 2.0" IFP Shocks
• (2) Front Bump Stop Drop Brackets — CS-FBDF-25-17 (2017–2026) / CS-FBDF05-25 (2005–2016)

Verified Fitment

✔ 2005–2026 Ford F-250 Super Duty 4WD — 6.7L Powerstroke Diesel
✔ 2005–2026 Ford F-350 Super Duty SRW 4WD — 6.7L Powerstroke Diesel

✘ Does NOT fit: Ford F-250/F-350 Gas engines — IFP valving is calibrated for Powerstroke platform weight; ride will be excessively stiff on gas-engine trucks
✘ Does NOT fit: Ford F-350 DRW (Dually) — front suspension geometry incompatible
✘ Does NOT fit: 2WD Super Duty models
✘ Does NOT fit: Trucks on stock-height springs or spacer leveling kits — extended shock length requires Carli lift springs to function within correct travel range
✘ Does NOT fit: Ford F-150 — incompatible platform
✘ Does NOT fit: Ram or GM platforms

Installation Notes

• Requires Carli leveling springs front and rear. Extended shock length will bottom out or overextend on stock spring height.
• FSP rear valving is optimized for Carli progressive rear leaf packs. Non-Carli rear springs will produce unbalanced damping.
• 2017+ models: verify brake line slack at full droop before finalizing installation. Carli extended brake lines recommended.
• Full front-end alignment required post-installation.
• Torque all fasteners to Carli specification. Re-torque at 500-mile break-in interval.
• High-salt environments: clean shock bodies and shafts regularly to prevent shaft pitting and seal degradation.

Engineering Question: Are you running Carli leveling springs front and rear, and what model year is your Super Duty? Lift height differs between 2005–2019 and 2020–2026 platforms, and FSP valving is calibrated for Carli rear leaf packs specifically. Confirm your full suspension configuration — springs, lift height, and rear pack — before ordering.