Tuff Country 55900KN 4.5" Lift Kit Non-Knuckle Design with Rear Blocks & U-Bolts with SX8000 Shocks
Tuff Country
55900KN
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Tuff Country 55900KN 4.5" Lift Kit Non-Knuckle Design with Rear Blocks & U-Bolts with SX8000 Shocks
Product Details
Description
Elevate your Toyota Tundra with the Tuff Country 55900KN 4.5" Lift Kit. Designed for 1999–2004 Toyota Tundra 2WD/4WD, this non-knuckle system delivers a level stance with dependable handling and value.
- Fits: 1999–2004 Toyota Tundra 2WD/4WD
- Lift height: 4.5" overall lift; rear lifted about 3" to achieve a level stance
- Design: Non-knuckle design for a straightforward install and reliable geometry
- Shocks included: SX8000 nitro gas shocks for improved dampening and control
- Rear hardware: Includes rear blocks and U-bolts
- Construction: One-piece sub-frame increases strength and durability
- Front suspension: Upper coil/strut spacer helps preserve a near factory ride; stock front struts can be retained
- Ball joints: New upper ball joint included with an upper ball joint spacer
- Tire compatibility: Supports up to 33" x 12.5" tires
- Rim/wheel note: Factory rims will not fit with this lift; backspacing 4.75" or less required
- Made in USA: Proudly manufactured in the United States
- Warranty: Backed by a limited lifetime warranty
This lift kit is engineered to give your Tundra a confident, level stance while maintaining ride quality. With the SX8000 shocks, a reinforced frame, and carefully matched spacers, you’ll gain ground clearance and improved off-road capability without compromising daily drivability. It’s a practical upgrade for trail days and weekend adventures, and it’s supported by Tuff Country’s long-standing reputation for durable suspension solutions.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 1999-2004 | Toyota | Tundra | 2WD | |
| 1999-2004 | 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.