Tuff Country 13085KN 3.5" Lift Kit SX8000 Shocks
13085KN
Pairs well with
Tuff Country 13085KN 3.5" Lift Kit SX8000 Shocks
Product Details
Description
The Tuff Country 3.5" SX8000 Lift Kit with Shocks is a bolt-on suspension upgrade designed for 2011β2018 Chevrolet Silverado 2500HD/3500 and 2011β2019 GMC Sierra 2500HD/3500 4WD. Itβs built to deliver reliable lift, improved tire clearance, and durable, USA-made components with a straightforward installation.
- Lift Height: 3.5 inches of front suspension lift to accommodate larger tires while preserving ride quality.
- Shocks Included: SX8000 front shocks are included for a complete, ready-to-install package.
- Bolt-on Installation: Designed for simple installation with no cutting or welding required.
- Tire Clearance: Increases room for up to 35" tires with minor trimming for improved off-road capability.
- Upper Control Arms: Heavy-duty tubular upper control arms maintain factory geometry for predictable handling.
- Reinforced Arm Eyelets: Strengthened connections ensure long-lasting performance under load and articulation.
- Cast Iron Lift Blocks: Heavy, purpose-built blocks engineered specifically for your vehicle.
- Suspension Limiting Straps: Included for controlled articulation and safety during flexing.
- Front Shock Extenders: Allow you to keep factory shocks in place while achieving the 3.5" lift (extenders included).
- Finish & Durability: Powder-coated finish provides lasting protection against corrosion and wear.
- US-Made & Warranty: Proudly made in the USA with a limited lifetime warranty for peace of mind.
- Backspacing & Fitment: Works with rims backspacing of 5.5" or less; factory tires and wheels can be used in most setups. Will not fit dually models.
- Installation Time: Typical install takes about 8β10 hours for a weekend project.
This Tuff Country kit is ideal for truck enthusiasts who want a straightforward, reputable upgrade that expands off-road range and tire options without sacrificing street manners. Use it to run up to 35" tires on your Silverado/Sierra 2500HD/3500 4WD, while keeping alignment and geometry intact thanks to the engineered control arms and solid cast blocks. When you choose Tuff Country, youβre leaning on more than 35 years of suspension expertise, a limited lifetime warranty, and the confidence that comes from buying from the worldβs leading retailer of Tuff Country products.
| Year Range | Make | Model | Drivetrain | Fitment Note |
|---|---|---|---|---|
| 2011-2018 | Chevy | Silverado 2500HD | 4WD | |
| 2011-2019 | Chevy | Silverado 3500 | 4WD | |
| 2011-2018 | GMC | Sierra 2500HD | 4WD | Will not fit dually model |
| 2011-2018 | GMC | Sierra 3500 | 4WD | Will not fit dually model |
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 youβre 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 customerβs 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 youβre 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.