Carli Suspension CS-F45-UC30-11 Unchained 3.0 Bypass System 4.5" Lift Kit 2011-2016 Ford F250/F350 4WD Diesel

The Carli Suspension Unchained 3.0 Bypass System represents the pinnacle of bolt-on suspension performance for 2011-2016 Ford F250/F350 Super Duty diesel trucks. This complete 4.5" lift system delivers uncompromised off-road capability combined with a controlled, civil on-road ride quality that makes your truck a blast to drive in all environments.

Carli-Tuned King 3.0" Bypass Shock Technology:

At the heart of this system are the massive Carli Signature-tuned King 3.0" shocks—2-tube front and 4-tube rear piggy-back bypass shocks with stainless steel shafts. The 3.0" shock features a piston surface area 45% greater than a 2.5" King and 126% larger than factory 2.0" shocks, delivering far superior efficiency and control. The bypass technology uses external tubes with fully adjustable one-way check valves that allow you to tailor fluid bypass around the piston during compression or rebound strokes. This provides a supple ride at normal ride height, then engages full valving when encountering large hits for maximum control.

Complete Front Suspension Components:

• Fabricated coil buckets with custom shock mounts to accommodate the oversized bypass shocks
• Progressive rate multi-rate coil springs for 4.5" front lift
• Radius arm drop brackets to reset pivot points and maintain linear travel
• Dominator bump stop drops with shortened extensions for increased up-travel
• 1-degree caster correction shims to tighten steering response
• Adjustable track bar to center the front axle
• Stainless steel brake lines for improved braking and adequate travel

Rear Suspension Features:

• King 3.0" 4-tube bypass shocks with fabricated rear shock mounts
• Increased wheel travel: 10.5" front and 13" rear
• Accommodates up to 37" tires with ease

Performance Specifications:

• Shock diameter: 3.0" front and rear
• Front lift height: 4.5"
• Rear lift height: 3.5" on F-250, 2.0" on F-350
• Maximum tire size: 37"
• Front wheel travel: 10.5" to 12"
• Rear wheel travel: 12" to 13"

Adjustability and Tuning:

The suspension comes pre-tuned by Carli with wide-open rebound and neutral compression settings, plus recommended tuning specifications. Users can adjust bypass tubes for more float and comfort or engage additional valving for enhanced control and off-road performance. Note that bypass-equipped shocks produce audible clicking from check valve operation during suspension movement.

Important Installation Notes:

This is a base kit that requires separate sway bar and leaf spring options to form a complete system. Recommended wheel specifications are 17"-18" diameter, no more than 9" wide with 5" backspacing. E-rated 37" tires are recommended with inflation pressures of 45 PSI front/40 PSI rear when unloaded. Trucks with 2-piece driveshafts require a carrier bearing drop for proper driveline angles. Due to this system's extreme off-road capability, Carli recommends adding a roll cage, axle truss, differential guard, high-mount steering stabilizer, and fabricated radius arms for maximum performance and protection.

What's Included:

King 3.0" 2-tube front bypass shocks, King 3.0" 4-tube rear bypass shocks, fabricated coil buckets, fabricated rear shock mounts, brake lines, radius arm drops, Dominator bump stop drops, 1° caster shims, adjustable track bar, and all necessary mounting hardware.

This system is CARB compliant and legal for use in California. It provides the most wheel travel of any Carli 4.5" system while maintaining excellent on-road manners—perfect for enthusiasts seeking maximum off-road performance without sacrificing daily drivability.