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Truck > On-Highway > COMFORT AIR 40K


40K On-Highway Rear Air Suspension

Designed with the passenger and driver in mind, 40K COMFORT AIR® delivers outstanding comfort along with exceptional handling characteristics for Class 8 vehicles.


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Parts Lists


Reduced Maintenance

  • Durable pivot bushing connection provides quiet operation and helps extend suspension service life
  • Rubber bushings require no lubrication
  • Reduced road shock and vibration to vehicle extends service life of cab, chassis and body equipment

Exceptional Stability and Handling

  • Front portion of springs and axle form box-shaped geometry for additional stability and handling

Superior Ride

  • Extended-length main support member generates lower spring rate for optimized roll stiffness, providing a more comfortable and compliant ride