BDS 6-Inch Lift Kit | FOX 2.5 Performance Elite Coil-Overs | Cast Steel Knuckles | Leaf Springs | Chevy Silverado / GMC Sierra 1500 4WD 2014–2018 | SKU: 717PES

Verified Fitment

Component Specifications

What Is and Is NOT Included

Critical Compatibility

Knuckle type confirmation is mandatory before ordering. Cast steel knuckles are required for this kit. Aluminum or stamped steel control arms require SKU 711PES. Contact OFAS at (469) 407-7538 before ordering if you cannot confirm your knuckle type.

K2 Silverado/Sierra 1500 6-Inch Kit Variant Reference

Contact OFAS at (469) 407-7538 to confirm which SKU is correct for your knuckle type, shock preference, and rear system before ordering.

Installation Notes

Skill Level: Advanced. A 6-inch coil-over lift with rear leaf spring replacement on the K2 platform requires a qualified suspension shop. Leaf spring replacement on a half-ton platform is a more involved rear suspension job than axle block installation — plan accordingly. Do not attempt DIY installation.

Required Tools:

• Full hydraulic lift rated for truck weight
• Coil-over compression tool
• Torque wrench
• Full socket and wrench set
• Spring compressor or leaf spring removal equipment per shop capability

Alignment: Full front-end alignment is mandatory after installation. Do not operate the vehicle on public roads before alignment is completed.

Knuckle Confirmation: Physically confirm or have a shop verify cast steel knuckles before ordering. Aluminum or stamped steel control arms require SKU 711PES. This is a hard stop — the wrong kit will not install correctly.

Reservoir Routing: Follow BDS and FOX installation instructions for FOX 2.5 PE reservoir placement. Avoid pinch points and heat sources. Incorrect reservoir routing causes premature shock failure.

Break-In Period: Allow FOX 2.5 PE shocks and new leaf springs to complete the manufacturer-recommended break-in period before aggressive off-road use. New leaf springs require a seating period before they reach their rated ride height.

Extended Brake Lines: Verify whether extended brake lines are required for your specific configuration at time of installation.

Torque Specs: Follow BDS-specified torque values included in the installation instructions. Do not substitute generic torque values on a lifted platform.

Tire Fitment: At 6 inches of lift on the K2 platform, typical fitment runs 35–37-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

The Obsidian Take

SKU 717PES is the leaf spring rear variant of the FOX 2.5 PE 6-inch system for the 2014–2018 K2 Silverado or Sierra 1500 4WD owner with cast steel knuckles. The distinction between 717PES and 710PES is the rear system — replacement leaf springs here versus a 5-inch axle block in 710PES. Same FOX 2.5 PE coil-overs up front, same cast steel knuckle requirement, same platform. The rear system is the only variable between these two SKUs.

Replacement leaf springs deliver a different rear ride characteristic than an axle block. Leaf springs replace the entire rear spring assembly — new spring rate, new ride height geometry, better articulation under load compared to a block-lifted factory spring. If you tow regularly or run this truck hard in the rear, the leaf spring rear is the more capable long-term solution. The 5-inch axle block in 710PES is a valid system, but a block-lifted factory spring does not change the spring rate — it raises the axle under the existing spring pack.

This kit is for you if: You own a 2014–2018 Silverado or Sierra 1500 4WD with confirmed cast steel knuckles, you want 6 inches of front lift with FOX 2.5 PE damping, and you want a replacement leaf spring rear rather than an axle block — whether for towing capability, ride quality under load, or long-term geometry preference.

This kit is not for you if: You have aluminum or stamped steel control arms — order SKU 711PES. You want a 5-inch axle block rear instead of leaf springs — order SKU 710PES for FOX 2.5 PE or SKU 710PSS for FOX 2.0. You are running a 2013 or earlier GMT900, a 2019 or newer T1/T1XX, a 2WD, or a 2500HD/3500HD. Confirm your knuckle type before ordering — the kit is non-returnable once installed.

Common Questions

What is the difference between SKU 717PES and SKU 710PES?
Both kits fit the 2014–2018 Silverado/Sierra 1500 4WD with cast steel knuckles and deliver 6 inches of front lift with FOX 2.5 Performance Elite coil-overs. The only difference is the rear system — 717PES uses replacement leaf springs and 710PES uses a 5-inch axle block. If you tow regularly or want a new spring rate at the rear, 717PES is the stronger long-term choice. Call (469) 407-7538 to confirm which rear system fits your use case.

What is the difference between SKU 717PES and SKU 711PES?
Knuckle type. SKU 717PES is for cast steel knuckles with a leaf spring rear. SKU 711PES is for aluminum or stamped steel control arms with a 5-inch axle block rear. These kits are not interchangeable — confirm your control arm and knuckle type before ordering.

Why choose leaf springs over an axle block at the rear?
A replacement leaf spring changes the entire rear spring assembly — new spring rate, corrected geometry, and better articulation under towing and hauling loads. A 5-inch axle block raises the axle under the existing factory spring pack without changing the spring rate. For trucks used for towing or heavy hauling, the leaf spring rear is the more capable long-term solution.

How do I confirm my knuckle type?
Have a shop verify before ordering, or contact OFAS at (469) 407-7538). Do not estimate — the knuckle type determines which kit applies and the kits are not interchangeable.

Does this kit include rear lift?
Yes. SKU 717PES includes replacement rear leaf springs and FOX Performance Elite rear shocks. This is a complete front-to-rear system.

What size tires fit at 6-inch lift on the K2 platform?
Typical fitment runs 35–37-inch tires depending on wheel offset and backspacing. Confirm maximum tire diameter and wheel specifications with your wheel and tire supplier before ordering.

What warranty covers this kit?
BDS suspension components are covered by the BDS No-Fine-Print Warranty. FOX 2.5 Performance Elite shocks carry a FOX 1-year limited warranty.

Manufacturer Data Disclaimer: Specifications sourced from BDS Suspension product documentation and authorized distributor data. Obsidian Forged Auto Supply is an authorized BDS Suspension dealer. Manufacturer specifications are subject to change without notice.

⚠️ California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information visit P65Warnings.ca.gov.

⚠️ Non-Returnable Notice: Suspension components are non-returnable once installed. Confirm knuckle type, year, and drivetrain before ordering. Call (469) 407-7538 with any fitment questions before your order is placed.