ReadyLift 4" Coil Spring Lift Kit Falcon Shocks Tubular Radius Arms Dual Steering Stabilizer - 2023-UP Ford F250/F350 4WD
49-23421
ReadyLift 4-Inch Premium Coil Spring Lift Kit with Falcon Shocks, Tubular Radius Arms & Dual Steering Stabilizer - 2023-UP Ford Super Duty F250/F350 4WD
Transform your 2023-and-newer Ford Super Duty F250 or F350 diesel into the ultimate performance truck with ReadyLift's most comprehensive 4-inch coil spring lift kit. This premium system features Falcon 1.1 Monotube shocks, heavy-duty tubular radius arms, and a Falcon dual steering stabilizer—delivering the perfect combination of aggressive stance, superior handling, and exceptional ride quality for both daily driving and serious off-road use.
The Premium Kit - Maximum Performance
What separates this kit (49-23421) from the standard version (49-23420) are two critical upgrades that dramatically improve performance:
- Tubular Radius Arms (instead of drop brackets)
- Falcon Dual Steering Stabilizer (not included in standard kit)
These upgrades provide superior suspension geometry correction, enhanced tire clearance, improved steering stability, and better handling with oversized tires—making this the choice for enthusiasts who demand the best.
Heavy-Duty Tubular Radius Arms - Built to Excel
The all-new ReadyLift tubular radius arms are engineered to correct suspension geometry on lifted models while surpassing factory radius arm strength and durability:
Radius Arm Advantages:
- Corrects Caster Angle: Maintains proper suspension geometry at the new ride height
- Heavy-Duty Construction: Built to handle the abuse demanded by Super Duty trucks
- Inward-Formed Design: Allows additional tire clearance for oversized tires
- Surpasses Factory: Stronger than OEM radius arms and support gussets
- Direct Bolt-On: Quick and easy installation, no permanent modifications
- Better Than Drops: Superior to drop brackets for performance and durability
These aren't just lift components—they're performance upgrades that improve your truck's capability.
Falcon Dual Steering Stabilizer - Superior Stability
The included Falcon dual steering stabilizer is crucial for any solid front axle vehicle equipped with oversized tires. This system provides:
Stabilizer Benefits:
- Superior Truck Stability: Critical for 37-inch tires and lifted applications
- Reduced Bump Steer: Smoother steering response over rough terrain
- Improved Steering Feedback: Better communication between road and driver
- Confident Handling: Enhanced maneuverability and control on and off-road
- Eliminates Death Wobble: Prevents dangerous steering oscillations
- Falcon Quality: Race-proven performance and durability
This upgrade alone significantly improves your truck's handling characteristics and driver confidence.
Falcon 1.1 Monotube Shocks - High-Value Performance
Four Falcon 1.1 Monotube performance shocks (front and rear pairs) come custom-tuned for lifted Super Duty applications:
Falcon 1.1 Technology:
- Monotube Construction: Superior heat dissipation and consistent damping
- Increased Stability: Dramatically improved handling over stock shocks
- Optimized Valving: Application-specific tuning for your truck
- On-Road/Off-Road: Exceptional performance in all conditions
- Professional-Grade: Race-inspired quality at accessible pricing
Complete Coil Spring System - Engineered for Excellence
ReadyLift's coil spring system includes specially engineered components developed specifically for 2023-up Super Duty trucks:
- Front Coil Springs: Precision-rated for front axle weight and lifted geometry
- Rear Fabricated Blocks: Quality steel blocks for proper rear lift height
- Track Bar Relocation Bracket: Proven design maintains proper track bar geometry
- All Hardware Included: Brake line extensions, bump stop extensions, sway bar brackets
Comprehensive Premium Kit - Everything You Need
This is ReadyLift's most complete Super Duty lift kit:
- (4) Falcon 1.1 Monotube performance shocks
- (2) Heavy-duty tubular radius arms
- (1) Falcon dual steering stabilizer
- Front coil springs (pair)
- Rear fabricated steel lift blocks
- Track bar relocation bracket
- Brake line extension brackets
- Bump stop extension brackets
- Front sway bar frame mount extension brackets
- All necessary hardware and detailed instructions
Fits 37-Inch Tires - Commanding Presence
With 4 inches of lift and tubular radius arms providing additional tire clearance, this kit accommodates aggressive 37-inch tall tires on 9-inch wide wheels with +18 to +25 offset. The inward-formed radius arm design maximizes clearance for oversized tires.
100% Bolt-On Installation - Professional Grade
Despite being a premium system, installation remains 100% bolt-on with no cutting or welding required. Estimated installation time is 6-8 hours for experienced installers. Professional installation and alignment strongly recommended.
Designed for Diesel 4WD - Single Rear Wheel Only
Fits 2023-up Ford Super Duty F250 and F350 diesel trucks with 4-wheel drive and single rear wheels (SRW). NOT recommended for 2WD, gasoline engines, DRW models, or single cab configurations.
Important Notes:
- Tremor Models: Will not gain full 4" lift (expect 2-3" additional)
- Onboard Scale Option: Requires separate Auto-Leveling Headlight Bracket (67-23610)
Why Choose the Premium Kit?
Standard Kit (49-23420) includes:
- Radius arm drop brackets
- No steering stabilizer
Premium Kit (49-23421) includes:
- Tubular radius arms (superior strength and clearance)
- Falcon dual steering stabilizer (essential for 37" tires)
If you're serious about performance, the premium kit is worth the upgrade.
ReadyLift Quality and Warranty
ReadyLift Suspension has been manufacturing premium suspension components since 1998. Every ReadyLift product is engineered, tested, and backed by their industry-leading limited lifetime warranty.
Upgrade Available: Already have the standard kit with drop brackets? You can upgrade to tubular radius arms (PN 77-23400) and add the Falcon dual steering stabilizer (PN 77-23200) separately.
Build It Right - Choose the Best
When you're investing in your Super Duty's suspension, choose the complete solution. The ReadyLift premium kit with tubular radius arms and dual steering stabilizer delivers performance that drop brackets simply can't match.
KEY FEATURES:
✅ 4" Front / 4" Rear Lift – Premium complete suspension system
✅ Falcon 1.1 Monotube Shocks – Four performance shocks included
✅ Tubular Radius Arms – Superior to drop brackets
✅ Falcon Dual Steering Stabilizer – Essential for 37" tires
✅ Fits 37" Tires – Maximum clearance with radius arms
✅ Track Bar Relocation – Maintains proper geometry
✅ 100% Bolt-On – No cutting or welding required
✅ Complete Premium Kit – Everything included
✅ 2023-UP Fitment – F250/F350 diesel 4WD SRW
✅ Made in USA – ReadyLift quality and engineering
TECHNICAL SPECIFICATIONS:
| Specification | Details |
|---|---|
| Part Number | 49-23421 |
| Manufacturer | ReadyLift Suspension |
| Front Lift Height | 4 inches |
| Rear Lift Height | 4 inches (via blocks) |
| Front Shocks | (2) Falcon 1.1 Monotube |
| Rear Shocks | (2) Falcon 1.1 Monotube |
| Radius Arms | Tubular HD (pair) |
| Steering Stabilizer | Falcon dual stabilizer |
| Track Bar | Relocation bracket included |
| Max Tire Size | 37" tall on 9" wide wheels |
| Recommended Wheels | 17"+ x 9" wide, +18 to +25 offset |
| Installation Type | 100% Bolt-On |
| Country of Origin | Made in USA |
WHAT'S INCLUDED:
Complete Premium Kit:
- (2) Falcon 1.1 Monotube front shocks
- (2) Falcon 1.1 Monotube rear shocks
- (2) Heavy-duty tubular radius arms
- (1) Falcon dual steering stabilizer system
- (2) Front coil springs
- Rear fabricated steel lift blocks
- Track bar relocation bracket
- Brake line extension brackets
- Bump stop extension brackets
- Front sway bar frame mount extension brackets
- All mounting hardware
- Detailed installation instructions