Air Spring Bag Replacement for Mack Truck Cab Sleeper – Compatible with 21338449 21338453, Heavy Duty Pneumatic Suspension Airbag, Direct Fit Air Spring for Semi Truck (1 Pack)

Direct Fit Air Spring Bag for Mack Truck Cab Sleeper This heavy-duty air spring bag is a direct replacement for your Mack truck’s cab sleeper suspension system. Engineered to meet or exceed OE specifications, it restores proper ride height and provides reliable pneumatic support for long-haul comfort and stability. Compatible with: – Mack Truck Cab Sleeper Models – Replaces OE Part Number: 21338449 21338453 Key Features: – Industrial-Grade Construction: Made from premium natural rubber with reinforced steel end plates for maximum durability under extreme road conditions. – Leak-Proof Design: Multi-layer cord reinforcement and precision-molded air seal prevent air leakage, ensuring consistent performance over time. – Weather Resistant: Built to withstand temperatures from -40°F to 200°F, plus resistance to ozone, oil, and weathering for extended service life. – Easy Installation: Direct fit design requires no modifications or special tools – a straightforward swap for your worn-out air spring. What’s Included: – 1 x Air Spring Bag (Replaces 21338449 21338453) – Installation instructions (if applicable) Why Choose This Air Spring? Whether you’re a professional truck driver or fleet manager, this air spring bag delivers the reliability and comfort your Mack truck needs. Backed by a 1-year warranty against manufacturing defects, you can purchase with confidence. Fitment Notes: Please verify your vehicle’s OE part number (21338449 21338453) before ordering to ensure compatibility. For additional fitment questions, contact our US-based support team.

• 1. 【DIRECT OE REPLACEMENT】 Exact fit replacement for Mack truck cab sleeper suspension systems – compatible with OE part number 21338449 21338453. No modifications or special tools required for installation, ensuring a seamless swap for your worn-out air spring bag.
• 2. 【HEAVY DUTY CONSTRUCTION】 Built with industrial-grade natural rubber and reinforced steel end plates, engineered to withstand extreme road conditions, temperature fluctuations (-40°F to 200°F), and constant vibration – delivering reliable performance for long-haul trucking.
• 3. 【SUPERIOR RIDE COMFORT】 Restores proper ride height and provides consistent pneumatic suspension support, effectively reducing cab shock, driver fatigue, and cargo vibration. Designed to maintain optimal air pressure for a smoother, more controlled driving experience.
• 4. 【LEAK-PROOF & WEATHER RESISTANT】 Features multi-layer cord reinforcement and precision-molded air seal to prevent air leakage over time. The durable rubber compound resists ozone, oil, and weather cracking, ensuring extended service life even in harsh environments.
• 5. 【1-YEAR WARRANTY & AFTER-SALES SUPPORT】 Backed by a 1-year warranty against manufacturing defects. Our US-based customer support team is ready to assist with fitment questions or installation concerns – purchase with confidence.