21-23 Ford F150 Tremor 4WD 3.5-4.5in Stage 4 Suspension Sys Billet UCA / Leaf Pack

ICON Vehicle Dynamics 2021-2023 Ford F-150 4WD suspension systems are designed with maximum performance and the serious driver in mind. ICON's primary focus is to increase wheel travel and damping ability, which translates into outstanding vehicle control and ride quality. To achieve this, these systems include high-strength CNC machined ductile iron steering knuckles that replicate the suspension geometry of the F-150 Tremor and are effectively a Tremor “conversion” for your F-150 4WD. This Stage 4 system includes vehicle-specific tuned 2.5” coilover shocks featuring CDCV equipped remote reservoirs for exceptional cooling properties and ICON-engineered coil springs for superior vehicle “feel” through the range of travel. These coilovers are adjustable for 3.5-4.5” of front lift, allowing the use of larger, more aggressive wheel and tire combos. Their combination with the ICON steering knuckles also allows for a 20% increase in wheel travel compared to other ICON F-150 kits. Billet aluminum Delta Joint PRO upper control arms not only add strength and durability but help retain factory alignment specs, offer on-vehicle caster/camber adjustment, and allow for the extra lift height this system provides. ICON 2.5 Aluminum Series CDCV piggyback reservoir rear shocks utilize vehicle-specific valving and offer increased damping and heat dissipation, balancing the performance of the truck from front to rear. The included ICON CDC Valves are externally adjustable valves that restrict oil flow into the reservoir which creates 10 levels of compression damping force ranges. ICON Multi-Rate Leaf Springs allow rear spring rate and ride height customization, improve ride quality, and reduce axle wrap by eliminating the factory rear blocks. Rear ride height is kept within an acceptable range using the ICON billet aluminum 1" lowering shackles. The ICON 2021-2023 F-150 4WD Stage 4 suspension system is an excellent choice for those looking to enhance the capabilities of their pickup.

This system features upper control arms with ICON's patented Delta Joint PRO. Delta Joint PRO is ICON's innovative new suspension articulation joint which combines the durability and longevity of factory style ball joints with performance and strength that exceeds traditional motorsports-style ball joints. The Delta Joint PRO features a new rebuildable, serviceable design in which any component may be removed, inspected, and replaced without having to purchase a whole new joint. Strength and durability are improved by using a larger ball with 56% more bearing surface than our standard Delta Joint, along with improved lubrication sealing. But improved performance is at the heart of the Delta Joint PRO, with a full 90 degrees of articulation, from one extreme to the other. This represents a 14% improvement in range of motion, over the highly capable original Delta Joint, allowing for maximum bind-free suspension movement through the complete range of travel. The Delta Joint PRO is built to take the abuse, with a chromoly ball and shaft that has a bearing surface hardened to Rockwell C 55. The replaceable races are made of graphite-impregnated sintered metal, machined to the finest tolerance to provide a flawless, metal-to-metal bearing interface. We also redesigned the lubrication system, with lubricant channels that distribute grease more efficiently without extending past the bearing seal.

MULTI-RATE INFO (with ICON Billet Shackles):

Option #1 (as shipped)

+1.50" rear lift height over stock (unloaded)

Option #2

+20% spring rate over Option #1

+2.75" rear lift height over stock (unloaded)

+1.50" rear lift height over stock w/ 400lb constant load

Option #3

+40% spring rate over option #1

+3.50" rear lift height over stock (unloaded)

+1.00" rear lift height over stock w/ 850lb constant load

Features & Benefits:

• High strength ductile iron steering knuckles replicate F-150 Tremor suspension geometry
• Adjustable coilovers offer 3.5-4.5" of front lift height over stock
• 2.5 Series front coilovers with remote reservoirs for improved shock cooling
• Billet Upper Control Arms with Delta Joint Pro ball joints for added strength, durability, and alignment spec range with on-vehicle adjustability
• 20% increase in front wheel travel and improved ride quality over stock with no change in towing capacity
• Vehicle specific tuned front and rear shocks for superior damping and vehicle control
• All shock absorbers equipped with CDC Valves for 10 settings of compression damping adjustment, from soft to hard
• Corrosion resistant CAD plated coilover shock bodies with 7/8" shafts
• FK rod end bearings for extended longevity and minimal deflection
• High strength alloy CNC machined lower bar pin
• 2.5 Aluminum Series piggyback reservoir rear shocks with 7/8" hardened chromed steel shafts
• 6061 Aircraft grade aluminum CNC machined components
• 3 user-adjustable rear spring rates for unique vehicle setups
• Reduced rear axle wrap and improved ride quality compared to stock leaf springs
• Billet aluminum lowering shackles feature maintenance and noise free OE Ford bushings
• 100% Bolt-on system - no cutting or welding necessary for install

NOTES:

• OEM Wheels & Tires Fitment: Not compatible with all available OE wheel/tire combinations. Aftermarket wheels with lower offset/less backspace recommended.
• Recommended Aftermarket Wheels: ICON Alloys - 17x8.5" w/ 5” Backspace / 6mm Offset
• Recommended Aftermarket Wheels: ICON Alloys - 18x9" w/ 5.25" Backspace / 6mm Offset
• Recommended Aftermarket Wheels: ICON Alloys - 20x9" w/ 5.625" Backspace / 16mm Offset
• Recommended Aftermarket Tires: 34" x 12.50" (Larger tires may fit but fender trimming and modifications will be required.)
• APPLICATION NOTE #55: Shocks Are Fully Serviceable. Coilover Heights Indicated Are For A Stock Equipped Vehicle
• APPLICATION NOTE #129: Will Not Work With Factory Installed Electronically Controlled Suspension
• APPLICATION NOTE #130: Equipped With Dynamic Bending Headlamps Purchase Part# 611071
• APPLICATION NOTE #152: ICON Delta Joint Pro Upper Control Arms Required
• APPLICATION NOTE #166: If equipped with Dynamic Bending Headlamps and/or OnBoard Scales part # 611081 is also required
• TECH NOTE: Only compatible with 4-wheel drive (4WD) models
• TECH NOTE: Models equipped with PowerBoost hybrid engines will have front lift height range of 3.25-4.25" over stock
• TECH NOTE: Models equipped with Power-Stroke diesel engines will have front lift height range of 3-4" over stock
• TECH NOTE: Not compatible with F-150 Raptor
• TECH NOTE: Not compatible with models equipped with BlueCruise
• TECH NOTE: Not compatible with models equipped with OnBoard Scales
• TECH NOTE: Rear springs can be configured to provide 1.5"-3.5" of rear lift or to tune ride height to compensate for added static weight in rear of vehicle

KIT COMPONENTS:

• 91824C (QTY: 1) | 21-23 F150 TREMOR 2.5-3" 2.5 VS RR CDCV COILOVER KIT
• 98523DJ (QTY: 1) | 21-23 F150 BILLET UCA DJ PRO KIT
• 97721CP (QTY: 1) | 21-23 F150 4WD TREMOR REAR 2.5 VS PB CDCV PAIR
• 94000 (QTY: 1) | 21-23 F150 4WD FRONT KNUCKLE KIT
• 91001 (QTY: 1) | 10-23 FORD F-SERIES BILLET 1" LOWERING SHACKLE KIT
• 198510 (QTY: 2) | 17-20 RAPTOR MULTI RATE LEAF PACK W/ ADD IN LEAF
• 95225H (QTY: 1) | 17-20 RAPTOR MULTI RATE LEAF SPRING HARDWARE KIT

21-23 Ford F150 Tremor 4WD 3.5-4.5in Stage 4 Suspension Sys Billet UCA / Leaf Pack | SKU: K93144L