Firestone Coil-Rite Rear Air Springs | 2007-2018 Jeep Wrangler JK

Improve Load Support and Ride Stability for Your Jeep Wrangler JK

The Firestone Coil-Rite rear air helper spring kit enhances suspension support, ride comfort, and vehicle stability for the 2007-2018 Jeep Wrangler JK. Designed to install inside the factory rear coil springs, this adjustable air spring system helps level the vehicle under heavy loads, towing conditions, and off-road gear setups.

Whether carrying camping equipment, oversized tires, rooftop tents, recovery gear, or towing a trailer, the Firestone 4173 Coil-Rite system helps improve braking effectiveness, steering control, and suspension balance while reducing bottoming out and uneven tire wear.

Vehicle Fitment

• Make: Jeep
• Model: Wrangler JK
• Body Style: 2-Door & 4-Door
• Years: 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018
• Position: Rear Suspension
• Fitment Note: Fits Coil Spring Rear Suspensions

Key Features

• Rear air helper springs designed for Jeep Wrangler JK coil spring suspensions
• Helps maintain a level ride height under load
• Improves steering control, braking performance, and vehicle balance
• Reduces rear suspension sag and bottoming out
• Adjustable air pressure from 5 PSI to 35 PSI
• Supports load-leveling capacity between 500 lbs. and 1,000 lbs.
• Constructed from durable elastic polyurethane material
• No-drill installation design for simplified setup
• Helps reduce uneven tire wear and suspension stress
• Compatible with optional Firestone air compressor systems
• Designed for use in temperatures from -40°F to 180°F
• Includes air springs, hardware, air line, and inflation valves

Built for Towing, Overlanding, and Off-Road Use

The Firestone 4173 Coil-Rite system is ideal for Jeep owners carrying heavy cargo, towing small trailers, or adding aftermarket bumpers, rooftop tents, tire carriers, and off-road accessories. Adjustable air pressure allows the suspension to adapt to changing loads and terrain conditions.

Adjustable Suspension Support Without Compromising Ride Quality

By fitting directly inside the factory rear coil springs, the Coil-Rite air helper springs create a variable spring rate that improves support during loaded conditions while maintaining ride comfort during everyday driving.

Frequently Asked Questions

What vehicles does the Firestone 4173 fit?

This kit fits 2007-2018 Jeep Wrangler JK models equipped with rear coil spring suspensions.

Does this kit require drilling during installation?

No. The Firestone Coil-Rite 4173 uses a no-drill installation design.

What is the air pressure range?

The adjustable operating pressure range is 5 PSI to 35 PSI.

Can this kit improve towing stability?

Yes. The air helper springs help reduce rear sag, improve steering control, and stabilize the vehicle under towing or heavy cargo loads.

Does this increase vehicle payload capacity?

No. The Coil-Rite system helps support and level the suspension but does not increase the vehicle’s factory GVWR.

SKU: BBQZ_4173