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Restore the RED Label system with the correct service spring
Firestone 8873 is a 224C RED Label Extreme Duty replacement air spring for the verified Ram 2500 application and Firestone kit 2706. Its commercial-grade bellows construction supports high-pressure load leveling while retaining the exact port and mounting arrangement required by the matching system.
Key Features
- Exact service part: Firestone 8873 replaces one air spring in RED Label kit 2706
- RED Label pressure rating: operates up to 150 PSI with a 400 PSI manufacturer test pressure
- 224C bellows: 3.00-inch compressed height and 8.91-inch extended height
- Working range: 5.50-to-7.00-inch ride height with a 7.52-inch maximum diameter
- Load rating: nominal 3,750 pounds per air spring at 100 PSI; actual load varies with height and pressure
- Correct interface: 1/4 NPT air port with the manufacturer-specified stud and blind-nut arrangement
Fitment
| Years | Make | Model | Drive | Application |
|---|---|---|---|---|
| 2014-2026 | Ram | 2500 | 2WD or 4WD | Rear replacement spring for Firestone RED Label kit 2706 |
Use 8873 only after matching the existing RED Label spring, kit number, mounting pattern, and port configuration. This is not a universal substitute for standard Ride-Rite springs.
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | 8873 |
| Firestone Assembly Number | W21-760-8873 |
| Bellows Series | 224C RED Label Extreme Duty |
| Quantity | One replacement air spring |
| Maximum Operating Pressure | 150 PSI |
| Manufacturer Test Pressure | 400 PSI |
| Compressed Height | 3.00 inches |
| Extended Height | 8.91 inches |
| Ride Height Range | 5.50-7.00 inches |
| Maximum Diameter | 7.52 inches |
| Upper Mount | Two 3/8-16 x 3/4-inch studs; 2.75-inch spacing |
| Air Port | 1/4 NPT |
| Lower Mount | 3/8-16 x 5/8-inch blind nut |
| UPC | 767555163153 |
What's Included
- One Firestone 224C RED Label replacement air spring
- Brackets, air line, fittings, compressor equipment, companion spring, and complete kit hardware are not included
About Firestone
Firestone Airide engineers Ride-Rite and RED Label load-support systems around application-specific brackets, bellows, pressure ranges, and mounting interfaces. Matching the service-spring number to the original kit is essential because similar-looking bellows can use different ports and mounting patterns.
Related Parts
- Firestone RED Label 2706 rear air spring kit for Ram 2500
FAQ
What is the 8873?It is one Firestone 224C RED Label replacement air spring with the mounting and port configuration specified for RED Label kit 2706.
Which vehicle applications are verified?Firestone lists the corresponding RED Label kit for 2014-2026 Ram 2500 trucks in both 2WD and 4WD configurations.
Is this a complete air spring kit?No. This listing is for one replacement air spring. Brackets, air line, fittings, compressor equipment, and the second spring are not included.
Can this replace a standard Ride-Rite spring?No. Firestone states that RED Label service springs are intended for RED Label kits or approved custom applications and are not substitutes for standard Ride-Rite kit springs.
What is the maximum operating pressure?Firestone rates the RED Label spring for operation up to 150 PSI, subject to the system and vehicle requirements.
What are the working dimensions?The 224C bellows has a 3.00-inch compressed height, 8.91-inch extended height, 5.50-to-7.00-inch ride-height range, and 7.52-inch maximum diameter.
What port and mounting pattern does it use?The manufacturer specifies two 3/8-16 by 3/4-inch studs, a 1/4 NPT air port, 2.75-inch upper spacing, and a 3/8-16 by 5/8-inch lower blind nut.
How should compatibility be confirmed?Match the part number, bellows series, port, mounting pattern, kit number, vehicle application, and existing spring before installation.
Does the air spring increase the truck's GVWR?No. Air springs support load management but do not raise the vehicle manufacturer's gross vehicle weight rating.
Installation Instructions
- Confirm the truck is a verified 2014-2026 Ram 2500 2WD or 4WD application using Firestone RED Label kit 2706.
- Match the existing spring's manufacturer number, 224C bellows dimensions, 1/4 NPT port, stud spacing, and lower blind-nut location before removal.
- Verify the replacement package is labeled Firestone 8873 and contains one undamaged service spring.
- Support the vehicle safely, exhaust all system air pressure, and follow the current Firestone kit instructions before disconnecting the air line or mounts.
- Remove the existing spring without damaging the brackets, air line, fittings, or surrounding suspension components.
- Inspect the brackets and hardware for wear, corrosion, deformation, or damage; replace unsuitable components before installing the new spring.
- Install the spring in the same orientation, reconnect the air line using approved sealing practices, and torque mounting hardware to the current Firestone specification.
- Inflate gradually, check for leaks, confirm clearance through the suspension's travel, and maintain at least the minimum pressure specified for the complete kit.
- Recheck the installation after initial use and never exceed the vehicle manufacturer's GVWR or axle ratings.
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