Tuff Country 55905KN 5" Lift Kit with Knuckles 1 Piece Sub-Frame Rear Blocks and U-Bolts with SX8000 Shocks
Tuff Country
55905KN
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Tuff Country 55905KN 5" Lift Kit with Knuckles 1 Piece Sub-Frame Rear Blocks and U-Bolts with SX8000 Shocks
Product Details
Description
Upgrade your 1999–2003 Toyota Tundra with a 5-inch lift kit from Tuff Country, built for off-road performance without sacrificing everyday drivability. This complete system pairs rugged components with thoughtful engineering to deliver clearances for bigger tires, improved mountain terrain capability, and lasting value.
- Lift Height: 5" front / 4" rear lift to increase ground clearance and open up room for larger tires.
- Shocks Included: SX8000 nitro gas shocks included for steady damping and enhanced control on rough trails.
- One-Piece Sub-Frame: Provides added strength and rigidity for confident handling under load and during aggressive articulation.
- Heavy-Duty Spindles: Replacement spindles with upper ball joints and bearings pressed in for durability and smoother steering.
- Upper Coil/Strut Spacers: Maintain a near factory ride while delivering the desired lift height.
- Front Struts Compatibility: Front stock struts can be retained, simplifying installation and reducing downtime.
- Rear Suspension Components: Includes rear SX8000 shocks, heavy-duty blocks, and U-bolts to complete the rear setup.
- Tire Compatibility: Ready for up to approximately 33" tires (33" x 12.5"), expanding traction for off-road adventures.
- Rim & ABS Notes: Designed to work with ABS brakes and automatic hubs; factory rims will not fit and rims with 4.5" backspacing or less are required; vehicles without ABS may need optional ABS plugs.
- Warranty & Support: Backed by a limited lifetime warranty for long-term peace of mind.
- Brand Experience: Tuff Country leverages more than 35 years of suspension expertise to deliver a reliable, value-driven lift kit.
- Vehicle Fitment: Specifically designed for 1999–2003 Toyota Tundra 2WD and 4WD applications.
Experience enhanced off-road capability with confident handling on rocky trails and muddy backroads. The combination of a sturdy one-piece sub-frame, heavy-duty spindles, and SX8000 shocks delivers improved rigidity and controlled damping, while upper spacers help preserve ride quality. Pair this kit with 33" tires for broadened traction, then enjoy a manageable installation, a durable suspension system, and the safety net of a limited lifetime warranty on a trusted name in suspension.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1999-2003 | Toyota | Tundra | 2WD | |
| 1999-2003 | Toyota | Tundra | 4WD |
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 $75
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.