On Sale Choose Options AirDog Champ II Spin-On Fuel Air Separator AirDog MSRP: $499.95 Now: $439.00 Was: AirDog® Champ II Spin-On High Pressure Fuel Air Separator Give your engine the performance, efficiency, and life expectancy boost both you and your big rig deserve with AirDog® Fuel Systems! *Please Verify Your Filter's OEM Number Before... MSRP: $499.95 Now: $439.00 Was: Choose Options