20505399 Air Spring | 1R12-405 / 1R12-595 | Newstar S-22540 | S&S Truck Replacement

20505399 Air Spring | 1R12-405 / 1R12-595 | Newstar S-22540 | S&S Truck Replacement

Product Summary:
20505399 is a heavy-duty air spring assembly commonly used in Volvo and Mack truck suspension systems. This unit is a high-quality aftermarket replacement from S&S Truck (Newstar S-22540), equivalent to Firestone models 1R12-405 and 1R12-595. Features durable construction for consistent ride height and load support.

Specs & Features:
• Part Number: 20505399
• Alternate Part Numbers: 1R12-405, 1R12-595, W01-358-8829, FS8829, S-22540
• Top Plate Mount: (2) Studs
• Bottom Plate Mount: (1) Stud
• Extended Height: Approx. 22"
• Condition: New Aftermarket (Replacement)
• Manufacturer: S&S Truck / Newstar
• Application: Volvo / Mack truck rear air suspension

What's Included:
• (1) Air Spring – S-22540 / 20505399

Fitment Notes:
• Cross references to multiple OEM and aftermarket part numbers — confirm by specs and mount pattern
• Compatible with select Volvo VN, VNL, and Mack models using these air spring sizes

Image Disclaimer:
Images may show the actual item or a representative equivalent. Packaging may vary depending on stock.

Warranty Policy:
This aftermarket product is sold as-is with no warranty expressed or implied.

Location:
Ships from our warehouse in Ohio.

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