PureFlow AirDog II-5G 89-93 Dodge 12V 5.9L Cummins DF-165-5G Fuel Air Separation System

AirDog builds the most recognized Fuel Air Separation Systems in the diesel performance industry, hand-assembling every unit to ensure consistent quality for owners of Cummins, Duramax, and Powerstroke-powered trucks. The AirDog system separates entrained air and vapor from diesel fuel before it reaches the injection pump, protecting expensive fuel system components and delivering more consistent fuel pressure for better performance under load.Popular UpgradesThe AirDog II-5G is the flagship system, featuring an integrated diaphragm fuel pressure regulator for finer pressure adjustability and improved flow at the pump. With larger porting to reduce cavitation and improved 12-gauge wiring harnesses with weather-sealed connectors, the II-5G is the choice for owners who want the latest generation technology. The system retains AirDog's proven Demand Flow operation, recirculating unused fuel back through the filter base for clean, vapor-free delivery to the injectors.Why do diesel truck...

This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...

Fuel air separators are a critical but often overlooked component in high-performance and diesel fuel systems, designed to purge entrained air bubbles from the fuel supply before they reach injectors or carburetors. Air contamination in fuel lines causes lean surges, injector misfires, rough idle, and long-term injector damage, particularly in diesel systems where precise injection timing depends on an incompressible fluid supply. Installing a separator between the fuel tank and injection pump ensures a consistent, air-free fuel stream under demanding conditions including high-altitude driving, aggressive fuel slosh during off-road use, and hot-soak restarts. Builders running upgraded injectors or high-pressure common-rail systems benefit most from the added protection. Popular Upgrades Top-selling fuel air separators include Racor series separators widely used in diesel performance builds, Fuelab inline separators designed for EFI and carbureted gasoline systems, and Canton Racing ...

A properly designed fuel delivery system is the backbone of any high-performance engine build, ensuring the injectors or carburetor receive a consistent supply of fuel at the correct pressure regardless of engine load, RPM, or fuel demand. From factory replacement pumps keeping daily drivers on the road to high-flow in-tank modules supporting 1000-horsepower builds, the right fuel delivery components prevent lean conditions, injector damage, and fuel starvation at the worst possible moment. Modern EFI systems are particularly sensitive to fuel pressure variation, with even small drops causing misfires and power loss under hard acceleration. Whether you are restoring a factory system or engineering a purpose-built race setup, matching pump flow rate and fuel pressure regulation to your injector and engine requirements is essential. Popular Upgrades Top-selling fuel delivery components include Aeromotive Phantom in-tank fuel pump kits that retrofit into factory tanks without custom fa...