Tuff Country 55906KH 5" Lift Kit with Knuckles 1 Piece Sub-Frame Rear Blocks and U-Bolts with SX6000 Shocks
Tuff Country
55906KH
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Tuff Country 55906KH 5" Lift Kit with Knuckles 1 Piece Sub-Frame Rear Blocks and U-Bolts with SX6000 Shocks
Product Details
Description
The Tuff Country 55906KH 5" Lift Kit with Knuckles, 1-Piece Sub-Frame, Rear Blocks, U-Bolts and SX6000 Shocks is a complete suspension upgrade designed for the 2004 Toyota Tundra 4WD. Built for truck owners seeking added ground clearance and capable off-road performance without compromising daily drivability, this kit delivers a robust 5-inch front lift and 4-inch rear lift to widen stance and fit larger tires.
- Lift Height: 5" front / 4" rear, providing a balanced stance and improved terrain clearance.
- Shocks Included: SX6000 shocks are included for dependable damping and improved control after installation.
- Knuckles & One-Piece Sub-Frame: Heavy-duty knuckles paired with a single, rigid sub-frame for enhanced strength and precise alignment.
- Rear Blocks & U-Bolts: Proper axle positioning and secure mounting with rear blocks and heavy-duty U-bolts.
- Front Coil/Strut Spacers: Upper spacers help maintain a near-factory ride while accommodating the lift.
- Front Struts Compatibility: Existing front stock struts can be retained, simplifying the upgrade.
- Fitment & Tire Expectations: Designed for 33" x 12.5" tires; 4.5" backspacing or less on rims is required; factory rims will not fit.
- ABS & Hub Compatibility: Built to fit ABS brakes and automatic hubs; vehicles without ABS may require optional plugs.
- Installation Notes: Factory-length shocks must be replaced with extended rear shocks for proper installation; comprehensive hardware included for a complete setup.
- Warranty & Support: Backed by Tuff Country’s limited lifetime warranty, plus access to expert guidance and support from the brand’s global network.
Benefits: Elevate your Toyota Tundra with a durable, well-balanced suspension upgrade that adds room for larger tires, improves ground clearance, and enhances off-road capability without sacrificing daily comfort. The combination of knuckles, a one-piece sub-frame, and upper coil/strut spacers maintains steering precision and ride quality, while the SX6000 shocks deliver controlled damping under load. The kit is designed to work with ABS brakes and automatic hubs, and comes with a complete hardware package to simplify installation. Whether you’re hitting trail challenges or planning a rugged workday, this lift kit helps you tackle tougher terrain with confidence while preserving a solid on-road feel.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 2004 | Toyota | Tundra | 2WD | |
| 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.
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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.