Replacement for Bendix BA921, this aftermarket compressor unloader kit from BIG Machine Parts is lab and vehicle tested for fit and durability. Designed for your truck air brake system. One Year / 100,000 Mile Warranty. 

• Includes: One (1) Kit
• Warranty

Application Summary: Freightliner, Kenworth, Peterbilt, International, Volvo, Mack; Bendix