Freightliner Cascadia/Columbia/Century Air Spring Bag – Replaces 18-40977-000 / 18-52651-000 / W02-358-7215
Warranty Information
ROADWEST stands behind the parts we sell. Unless otherwise stated on the product page, your purchase is covered by a 1-Year Limited Warranty against manufacturing defects under normal use.
What’s covered
- Defects in materials or workmanship
- Premature failure caused by factory-related issues
What’s not covered
- Normal wear and tear, cosmetic aging, corrosion from environment/road salt
- Damage from improper installation, incorrect wiring, modifications, misuse, or accidents
- Labor costs (installation/removal), downtime, towing, or other indirect costs
How to file a claim
Contact us with:
- Order number
- Product name / SKU
- Clear photos or a short video showing the issue
If approved, ROADWEST will provide an appropriate resolution (replacement parts, replacement unit, or refund/credit).
Please do not send items back without return authorization.
For more details, see our Shipping Policy, Easy Return & Refund Policy, and Warranty pages.
Shipping & Returns
Most ROADWEST orders ship from our U.S. warehouses within 1–2 business days. Standard ground delivery in the contiguous United States is typically 1–3 business days, with freight service used for oversized or extra-heavy parts.
- Shipping area: United States only (no PO Boxes or international addresses).
- Processing time: In-stock items usually ship within 1–2 business days, Mon–Fri.
- Delivery: Standard ground or LTL freight depending on size and weight.
- Returns: Most unused items may be returned within 30 days of delivery, subject to inspection and our return guidelines.
- Costs: Original and return shipping are generally the customer’s responsibility, unless the issue is caused by ROADWEST (wrong item, damaged on arrival, etc.).
For full details, please review our Shipping Policy and Easy Return & Refund Policy before placing your order.
Restore ride comfort and control on your Freightliner with the High Soar 2 Pcs Air Spring Bag Kit. This heavy-duty air suspension replacement set is engineered for Freightliner Cascadia, Columbia and Century Class ST applications, helping reduce vibration, improve stability and keep your truck riding level under load.
Each air spring bag is designed as a direct replacement for OEM part numbers 18-40977-000, 18-52651-000, 7215 and W02-358-7215, allowing you to swap out worn or leaking bags without modification. The bellows are built from imported high-density rubber that exceeds standard OEM requirements, providing greater durability and better load performance than typical air suspensions.
By absorbing harsh road shocks and vibrations, the High Soar air spring bags help protect drivers and passengers from impact, while improving braking stability and extending the life of other suspension components. This 2-piece kit is ideal for maintenance on fleet trucks and owner-operator rigs alike.
- Direct-fit replacement for Freightliner Cascadia, Columbia and Century Class ST using OEM numbers 18-40977-000, 18-52651-000, 7215 and W02-358-7215.
- High-density multi-ply rubber bellows exceed OEM specs for enhanced durability and load-carrying capability.
- Improves comfort & safety by reducing vibration, limiting collision impact and helping keep ride height and braking more stable.
- Heavy-duty construction designed for long-haul, regional and vocational Freightliner applications.
- 2-piece kit allows you to replace air springs in pairs for more consistent ride and performance.
- Backed by a 1-year warranty with 100% quality assurance and responsive customer support.
| Brand | High Soar |
|---|---|
| Product Type | Air Spring Bag / Air Ride Suspension (2-Pack) |
| Application | Freightliner Cascadia, Columbia, Century Class ST Suspension |
| Vehicle Make / Models | Freightliner Cascadia; Freightliner Columbia; Freightliner Century Class ST (verify by OEM number) |
| Cross Reference | 18-40977-000; 18-52651-000; 7215; W02-358-7215 |
| Material | High-density reinforced rubber bellows with metal piston components |
| Function | Supports ride height, absorbs vibration, improves ride comfort and braking stability |
| Quantity | 2 × Air Spring Bags (Pair) |
| Fit Type | Vehicle Specific Fit – Freightliner trucks using listed OEM part numbers |
| Special Features | Enhanced load performance, reduced vibration, heavy-duty construction for commercial use |
| Warranty | 1-Year Warranty with 100% Quality Assurance |
| Included Components | 2 × High Soar Air Spring Bags for Freightliner Cascadia / Columbia / Century Class ST |
| Important Note | Please confirm your OEM part number and truck model before purchase to ensure proper fitment. |
| Manufacturer | High Soar |