Synergy Caster Sleeves - 05-23 Ford F-250/350 4WD

Product Name: Synergy Caster Sleeves - 05-23 Ford F-250/350 4WD
Manufacturer: Synergy
Manufacturer Part #: 8612-24
Thoroughbred Diesel Part #: SYN8612-24
Fitment Notes: 05-23 Ford F-250/350 4WD

Give your Ford Super Duty the stance and performance it deserves with the Synergy 2005-2023 Ford Super Duty 4x4 Leveling Systems! This system lifts the front end for a leveled look while drastically improving ride quality, handling, and suspension travel. 

The system features progressively wound coil springs paired with your choice of FOX 2.0 or FOX 2.5 shocks, giving you a smoother ride on the street and greater bottom-out resistance off-road. With smart additions like bump stop spacers, brake line relocation brackets, and caster shims, this kit installs cleanly while retaining factory functionality. 

For best results and true performance gains, we strongly recommend upgrading your build with our Heavy Duty Adjustable Track Bar and a Synergy Heavy Duty Steering Kit for either the FSD 250 / 350 or the FSD 450 / 550 / 600 platforms. These components correct axle alignment, eliminate steering play, and ensure your suspension system performs as a complete, dialed-in package—both on and off the trail.

Includes:

• (1) 8663-25 2.5" Leveling Springs, Pair
• (2) Fox 2.0 Front Smooth Body Shocks
• (2) Fox 2.0 Rear Smooth Body Shocks
• (1) 8657-01 1" Front Bump Stop Spacers
• (1) 8612-24 Caster Sleeve Kit
• (1) 8673-01 Sway Bar End Link Spacer Kit
• (1) 8682-01 Front Brake Line Relocation Brackets
• (1) 8650-01 Fox Shock Eyelet Sleeve

Notes:

• 2.0" shocks are IFP (Internal Floating Piston) shocks and designed to separate the shock oil from the nitrogen-charged gas chamber and eliminates oil aeration
• 2.5" shocks are a HTO (Hydraulic Top Out) shock. This is an IFP shock with position-sensitive rebound technology and a secondary shim stack to slow down shaft speed, reducing harsh top-outs and increasing rebound damping control on and offroad
• Important notes:
  • Provides closer to 3.5" of lift on 2020+ model trucks
  • Leveling kits provide no additional suspension height on Ford Tremor models, while still providing the suspension performance benefits
  • Due to axle equipment changes to achieve proper caster shim fitment on 2024 and newer trucks, a true manual locking hub on the passenger side is required
• Depending on axle equipment, some model F-450 / F-550 / F-600 trucks may not be able to use the supplied caster shims
• Fits 35x12.50 with no trimming
• Minor fender trimming needed to fit 37x12.50 depending on wheel backspacing
• An adjustable track bar is required to recenter your axle after installing a suspension lift; We recommend either Synergy Adjustable Track Bar 7675-01 or 7675-02 
• Not compatible with trucks equipped with Front Suspension Height Sensor; For use with leveling kit, this sensor must be removed or the linkage arm lengthened 
• For use on 2023+ trucks equipped with the 14 bolt Dana Advantek M235, a true manual locking hub on the front passenger side or trimming of the axle shaft dust shield is required to utilize the included caster sleeves

Benefits:

• Levels the truck with progressive rate, hot wound coil springs paired with custom Synergy tuned FOX shocks
• CNC hot winding creates a more durable spring with a softer rate, increasing ride comfort and control and ensures they will never settle or sag
• Coils springs are engineered to increase small bump compliance and be resistant to bottoming out or binding
• Complete with your choice of either FOX 2.0 or FOX 2.5" shocks for all four corners to provide the best ride quality
• FOX shocks include a custom Synergy tune, tested and designed for the Ford Super Duty platform
• Includes brake line relocation brackets, caster sleeves, and bump stop spacers to retain stock suspension geometry and factory handling characteristics
• Front wheel travel is increased 30% from 7-3/4" to 9-3/4"
• No loss in towing capacity or performance
• Allows for installation of 35 inch or 37 inch tires, with the proper backspacing
• Coil springs are engineered and manufactured in the USA, for durability you can trust

Synergy Features:

• Precision CNC hot wound coil springs are bind-free and won't stress fracture when compressed
• Proprietary Synergy Tuned Fox Shocks - available in 2.0 or 2.5
• Two stage abrasion resistant powder coat finish for maximum durability and corrosion resistance
• CNC laser cut and zinc plated brake line relocation brackets for a precise fit and prolonged life
• High strength 1045 steel caster shims, zinc plated for corrosion protection
• Precision CNC machined 6061 aluminum bump stop spacers
• 100% bolt-in components assures an easy, trouble free installation with the use of basic hand tools
• For more information on Synergy call us at 1-859-737-4966