Firestone Coil-Rite: 4186 Rear Kit






Designed for Cadillac, Chevrolet, and GMCs with coil spring suspensions. Install Coil-Rite air springs on your SUV for better road handling. Works with autoride suspension.

Available To Purchase Online
Where To Buy

Details & Benefits

  • Designed to work in temperatures between -40˚F (-40˚C) and 180˚F (82˚C)
  • Easily control air pressure in the air springs for varying loads and conditions
  • Spring performance can be altered as easily as inflating a tire
  • Made of durable, elastic polyurethane
  • Fill kit

    fill kit


  • load capacity

    load capacity


  • installation


    No Drill

  • in-bed hitch


    Not Compatible

  • min. air pressure

    minimum air pressure

    5 PSI

  • max air pressure

    maximum air pressure

    25 PSI

  • install time

    install time

    1 HOUR(s)

Air Accessory Systems

2097 Single Level Analog Heavy Duty 2497
2158 Single Level Analog Standard Duty 2497
2178 Dual Level Analog Standard Duty 2497
2219 Dual Level Analog Heavy Duty 2497
2538 Single Level Analog Light Duty 2497
2581 Dual Level Wireless Light Duty 2588
2589 Dual Level Wireless Standard Duty 2588
2610 Single Point Wirless (App Only) Light Duty 2612

Vehicles Compatible with 4186


What's Included

Everything is included for a quick, easy installation.

  • Air springs
  • Hardware
  • Air line and separate valves for manual inflation, the same as you would use for inflating a tire

Optional air accessories are available for all applications. 

Additional Info

Perfect loads and perfect roads don't exist. That's where Firestone Coil-Rite air spring kits come in handy. Coil-Rite technology balances your Cadillac, Chevrolet, or GMC to promote more effective handling and braking, even when driving in unfavorable road conditions or towing a heavy trailer. As a result, properly installed Coil-Rite SUV air springs also help level headlight beams and promote even tire wear.

Coil-Rite air helper springs can be installed on most SUVs with coil spring suspensions. They sit within the current coil springs to produce a variable spring rate. A variable spring rate allows for a higher spring rate in loaded conditions and a slower spring rate in unloaded conditions. The outcome? A gentler journey for everyone inside your SUV, and more control and support when you're behind the wheel.

Is it easy to install Firestone Coil-Rite in a Cadillac, Chevrolet, or GMC? You bet. Coil-Rite air spring kits come with all the necessary parts for a fast, hassle-free installation. Most Firestone Coil-Rite SUV kits are no-drill, with install times averaging one to two hours. Coil-Rite air helper springs are manufactured out of elastic polyurethane and fasten to your Cadillac, Chevrolet, or GMC's current spring seats. Switches, gauges, air tanks, and air compressors can be purchased separately. Purchase additional air accessories for your Cadillac, Chevrolet, or GMC to monitor and adjust your SUV air springs from inside your vehicle.

Once installed, your Coil-Rite air helper springs can be adjusted manually with individual inflation valves to support ride comfort and a centered load. Maintaining a balanced load lessens body roll to promote overall vehicle stability. By softening the interaction between your Cadillac, Chevrolet, or GMC's frame and axles and absorbing road shock, Coil-Rite air springs also help prevent bottoming out.

Plus, shifting temperatures won't throw a wrench in your plans when you drive with Coil-Rite air springs. Firestone Coil-Rite air springs were made to function in temperatures between -40F (-40C) and 180F (82C). Summer or winter, north or south— drive your SUV where you want to go.

For your safety, remember that Coil-Rite air springs will not increase your Cadillac, Chevrolet, or GMC's weight-carrying capacity. Always confirm manufacturer recommendations for hauling or towing before loading up.

Locate your nearest Coil-Rite retailer and buy a Cadillac, Chevrolet, or GMC Firestone Coil-Rite air spring kit today. Part W237604186 works with autoride suspension.

How Can We Help You?

Please contact us for more information on how to improve the comfort of your ride.