RETRUE Air Bag Replacement for Firestone 2500 lbs Air Spring

Replace worn or damaged air springs with the RETRUE Firestone 6397 replacement air bags, designed to restore towing stability, rear support, and ride control. This double bellows air bag suspension part helps reduce squat, sway, bottoming out, and bounce when towing RVs, campers, trailers, boats, or hauling cargo.

2,500 lbs Load Leveling Capacity:
Supports rear suspension performance under load and helps maintain proper ride height for safer towing and hauling.

Adjustable 5–100 PSI Pressure:
Fine-tune firmness based on cargo weight, trailer tongue load, and road conditions for better control.

Double Bellows Air Spring Design:
Reinforced dual-bellow construction improves shock absorption, weight distribution, and air suspension kit performance.

Durable Replacement Construction:
Heavy-duty rubber and corrosion-resistant metal end caps deliver reliable air suspension air bags support.

Direct Replacement Fit:
Compatible with Firestone 6397 air spring suspension systems and includes fitting and mounting hardware.

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.