Tuff Country 25921KN 6" Standard Lift Kit with Front Leaf Springs Rear Blocks Add-A-Leaf and U-Bolts with SX8000 Shocks
25921KN
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Tuff Country 25921KN 6" Standard Lift Kit with Front Leaf Springs Rear Blocks Add-A-Leaf and U-Bolts with SX8000 Shocks
Product Details
Description
The Tuff Country 25921KN 6" Lift Kit is a complete suspension upgrade built for 1999–2004 Ford F-250/F-350 4WD pickups. It lifts the front and rear to accommodate larger tires while delivering a balanced, capable ride with reliable Tuff Country engineering behind every mile.
- Lift Height: 6" front / 4" rear lift to create a confident stance and ample tire clearance.
- Front Suspension: Ford EZ-Ride front leaf springs designed to maintain ride quality while increasing load capacity.
- Rear Suspension: Rear blocks and Add-A-Leaf to preserve rear axle alignment and suspension travel after lifting.
- Shocks Included: SX8000 shocks provide progressive damping for smoother on- and off-road performance.
- Track Bar Relocation: Relocation bracket with camber adjustment bolt preserves steering geometry after the lift.
- Hardware & Components: U-bolts and all necessary mounting hardware included for a complete installation.
- Tire Clearance: Supports up to 36" x 12.5" tires for enhanced off-road capability and aggressive appearance.
- Installation Notes: Factory length shocks must be replaced with extended shocks to install properly. If you have factory overloads, the kit requires the separate U-bolt kit 27955. Not for dually models.
- Fitment & Warranty: Designed for 1999–2004 Ford F-250/F-350 4WD with gas 351 engines; backed by a limited lifetime warranty and over 35 years of suspension engineering experience from Tuff Country.
With this lift kit, you gain the ability to tackle rough terrain with improved ground clearance, a more commanding stance, and capacity to run larger tires without sacrificing control. The combination of EZ-Ride front springs, Add-A-Leaf reinforcement, and SX8000 shocks delivers a balanced ride that remains predictable on daily drives while offering dependable performance on trails. This kit is an ideal upgrade for truck enthusiasts who want a capable, durable solution that aligns with Tuff Country’s long-standing reputation for quality and value.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1999-2004 | Ford | F250 | 4WD | with Gas 351 Only Engine Starts April 1999 |
| 1999-2004 | Ford | F350 | 4WD | with Gas 351 Only Engine Starts April 1999 |
Specifications:
Packaging Details
FAQs
Please read our FAQs page to find out more.
Will this part fit my vehicle?
Fitment varies by year, make, model, drivetrain, and lift height. Always use the vehicle fitment selector or refer to the fitment notes on the product page before purchasing. If you’re unsure, our team can help confirm compatibility.
Are Tuff Country products street legal?
Most Tuff Country products are designed for on-road and off-road use, but local laws and regulations vary by state and country. It is the customer’s responsibility to ensure compliance with local vehicle regulations after installation.
Is professional installation required?
Professional installation is recommended but not required. Many products can be installed by experienced DIYers with proper tools. However, improper installation can affect ride quality, safety, and warranty coverage.
Will this affect my ride quality?
Tuff Country products are engineered to balance ride comfort, performance, and durability. Ride quality can change depending on lift height, vehicle setup, tire size, and other suspension components.
Are Tuff Country products covered by a warranty?
Yes. Tuff Country products are backed by a manufacturer warranty that covers defects in materials and workmanship. Warranty terms vary by product type and do not cover damage caused by misuse, improper installation, or normal wear.
Can I run larger tires with this product?
Many Tuff Country lift kits and suspension components allow for larger tire sizes, but maximum tire clearance depends on wheel offset, tire width, and vehicle configuration. Refer to the product details or contact support for guidance.
What is the return policy?
Unused, uninstalled products may be eligible for return within the stated return window. Items must be in new condition and returned in original packaging. Shipping costs and restocking fees may apply.
Who can I contact if I have questions?
Our customer support team is available to help with fitment questions, installation guidance, and order support. Reach out before purchasing if you want to ensure you’re selecting the right part for your build.
Free shipping on Orders Over $150
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Selling Suspension Systems for 35+ Years
Tuff Country EZ-Ride Suspension was incorporated over 35 years ago, realizing the desperate need for quality suspension products in the after market world.