ICON 2007-2018 Jeep JK Wrangler Rear 4.5" Lift Box Kit

The ICON Vehicle Dynamics Rear 4.5" Lift Box Kit (SKU 21000) supplies the miscellaneous hardware needed to complete the rear of a 4.5" lift on 2007–2018 Jeep JK Wranglers, including a fabricated track bar drop bracket, adjustable sway bar links, billet aluminum bump stop spacers, stainless-steel braided brake lines, and all required mounting hardware.

Shipping: ICON parts ship direct from ICON Vehicle Dynamics, mostly by UPS Ground. Lead times vary by part and some items are built to order, so please allow extra time. We email tracking as soon as your order ships.

Precision-Formed Bracket and Linkage

The rear track bar drop bracket is CNC laser-cut and brake-formed, then powder-coated for corrosion resistance. Maintaining proper track bar geometry after a 4.5" lift keeps the axle centered under the vehicle, reducing bump steer and uneven tire wear that a non-relocated track bar would introduce at lifted ride height.

Adjustable Sway Bar Links with Quality Joints

The fabricated rear sway bar links are adjustable and use FK rod ends paired with polyurethane bushings. Adjustability lets the installer dial in the correct length for the lifted geometry rather than accepting a fixed-length compromise, while FK rod ends provide a precise, low-slop pivot that holds its feel over time.

Extended Brake Lines and Bump Stop Spacers

The kit includes extended stainless-steel braided brake lines sized for 4.5" of lift. Factory brake lines pulled taut at full droop are a safety concern, and including extended lines in this kit means that concern is addressed without a separate purchase. Billet aluminum bump stop spacers relocate the bump stop contact point to match the new suspension travel, preventing metal-to-metal contact at full compression.

Features

• Track bar drop bracket: CNC laser-cut, brake-formed, powder-coated steel
• Bump stop spacers: billet aluminum, CNC machined
• Sway bar links: fabricated, adjustable, with FK rod ends and polyurethane bushings
• Brake lines: extended stainless-steel braided construction
• Hardware: all required mounting hardware included

Specifications

Who This Is For and Isn't

This kit is for owners of 2007–2018 Jeep JK Wranglers who are installing an ICON 4.5" rear lift suspension system and need the complementary hardware (track bar relocation, sway bar links, bump stop spacers, and extended brake lines) to complete the installation safely.

This kit does not include shocks, springs, or control arms; it is not a standalone lift kit. It is not designed for JK Wranglers lifted to a different height, for JL Wranglers, or for any other vehicle.

Common Questions

Does this kit include shocks or springs?

The ICON Rear 4.5" Lift Box Kit does not include shocks or springs. It supplies the bracket, linkage, bump stop spacers, and brake lines needed to support an ICON 4.5" rear lift system. Shocks and springs are part of the separate ICON lift system this kit is designed to complement.

Which Jeep Wrangler years and models does this fit?

This kit fits 2007 through 2018 Jeep JK Wrangler models (rear application only). It is not compatible with the JL-generation Wrangler (2018-present) or any other Jeep model.

Is all mounting hardware included?

Yes. The ICON Rear 4.5" Lift Box Kit includes all required mounting hardware alongside the track bar drop bracket, sway bar links, bump stop spacers, and brake lines. No separate hardware purchase is needed to install the kit's components.

Why do brake lines need to be replaced when lifting?

At 4.5" of lift, the factory brake lines are too short for the increased suspension travel and can be pulled taut or damaged at full droop. The extended stainless-steel braided brake lines in this kit are sized for the lifted geometry, maintaining safe brake-line slack throughout the suspension's range of motion.