RETRUE Air Bag Replacement for Firestone 2500 lbs Air Spring

Replace worn or damaged air springs and restore your truck’s towing stability with the RETRUE Air Bag Suspension Replacement for Firestone 6397. Designed for heavy-duty load support, this double bellows air spring helps reduce rear-end sag, trailer sway, bottoming out, and excessive bounce when towing RVs, campers, utility trailers, boats, or hauling cargo.

2,500 lbs Load Leveling Capacity:
Provides dependable rear suspension support for towing and hauling applications. Helps maintain proper ride height under load for safer and more controlled driving.

Adjustable Air Pressure (5–100 PSI):
Fine-tune your suspension firmness based on trailer tongue weight or cargo load. Improves steering response, braking stability, and overall ride comfort.

Double Bellows Air Spring Design:
The reinforced dual-bellow rubber construction improves shock absorption and weight distribution while reducing suspension stress during towing.

Durable Rubber & Metal Construction:
Built with heavy-duty rubber air springs and corrosion-resistant metal end caps for long-lasting durability in harsh road and weather conditions.

Direct Air Spring Replacement:
Compatible replacement for Firestone 6397 air suspension systems. Includes air fitting and mounting hardware for easier installation.

Reduce Squat, Sway & Bounce:
Helps level your truck while towing to improve headlight alignment, tire contact, and trailer stability on highways and uneven roads.

Compatible replacement for Firestone 6397 air spring systems used in select:
·Pickup trucks
·Towing setups
·Utility trailers
·RV hauling applications
·Rear helper spring systems
·Load leveling air suspension systems

Please verify dimensions and mounting specifications before purchase.

Shipping:
We ship our products primarily through USPS/UPS. All items will be shipped within 72 business hours upon receipt of payment (except Saturday and Sunday). Orders placed on weekend will be shipped within 4 days.

Returns:
Items purchased from RETRUE may be returned in original unused condition within 30 days from the date of purchase for a refund, to the original form of payment. All returns must be pre-approved by RETRUE. Otherwise, unauthorized returns will not be accepted.

Warranty: Air Springs: Limited Lifetime
Hardware & Brackets of Air Springs: 2 Years
Bumpers, Hardware, Fittings & Air Line of Air Accessories: 2 Years
Hardware & Brackets of Air Accessories: 1–2 Years (depending on model; view product warranty documents for details)

Product Type: Air Bag Suspension Replacement

Replacement For: Firestone 6397

Load Capacity: Up to 2,500 lbs

Air Pressure Range: 5–100 PSI

Design: Double Bellows Air Spring

Top Port Thread: 5/8-18 UNF

Bottom Thread: 3/8-16 UNC

Uninflated Height: 5.5" (139.7 mm)

Fully Inflated Height: 6.5" (165.1 mm)

Diameter: 4.37" (111 mm)

Material: Reinforced Rubber Bellows with Metal End Caps

Color: Black and Silver

Included Hardware: Air fitting ×1, nyloc nut ×1, flange bolt ×1, flat head bolt ×1

Quantity: 1 Air Spring Bag

Recommended Use: Load leveling, towing support, rear suspension stabilization, heavy hauling applications

Q1. Is this air bag compatible with Firestone 6397 systems?
A: Yes. This RETRUE air spring is designed as a replacement for Firestone 6397 air suspension systems with matching mounting specifications.

Q2. Does this air bag increase towing capacity?
A: No. This product helps improve load leveling, towing stability, and ride control, but it does not increase your vehicle’s factory-rated towing or payload capacity.

Q3. What air pressure should I run?
A: The recommended operating range is 5–100 PSI depending on vehicle load, trailer weight, and ride preference.

Q4. Will this help reduce rear-end squat?
A: Yes. The air spring helps maintain a more level ride height when towing or hauling heavy loads, reducing suspension sag and instability.

Q5. What is included in the package?
A: The package includes 1 air spring, 1 air fitting, 1 nyloc nut, 1 flange bolt, and 1 flat head bolt.