The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
Enter your truck info so we can recommend the right products for you.
Can't find it? Call us at 866-737-4966 for free advice.
Water Meth Inj Kits
Thoroughbred Diesel has been your online performance headquarters since 2002. We know how to get the most performance out of your pickup truck and offer all of today's most popular diesel performance products.
Thoroughbred Diesel offers OEM and diesel stock parts for your diesel pickup truck. At Thoroughbred Diesel, you can
buy stock diesel replacement parts such as injectors, fuel pumps, ball joints,
track bars, turbos, and more for your diesel truck.
Diesel Tips Shirts
Show your support with a Thoroughbred Diesel t-shirt, sweatshirt, or sticker decal.
Floor Mats and Liners
Spare Tire Carriers
Make heads turn with custom truck accessories from Thoroughbred Diesel.
Diamond Eye Performance
Thoroughbred Sku #: PFT1114GMII4G
$699.00 - $919.99
View More Products From
Product Name: AirDog II 4G
Manufacturer: Airdog Fitment Notes: 2011-2014 GM Duramax
The patented AirDog II 4G has been quality engineered to remove entrained air and water vapor from diesel fuel. The result is a compact, long lasting, efficient, and quiet fuel system made with superior quality.
Advancing the AirDog Tradition with the 4th Generation Fuel System!
The AirDog II 4G system improves engine performance by:
Benefits of the AirDog II 4G:
AirDog II 4G also overcomes loss of power for diesel engines operating at higher altitudes.
AirDog II 4G Features
All-Inclusive Installation Kit includes:
AirDog II 4G Fuel Air Separation System featuring Demand Flow Technology and Enhanced Features
AirDog II 4G is designed to operate at flows and pressures beyond the maximum requirements of the engine. It receives fuel under vacuum from the fuel tank containing entrained air/vapor, particulate contaminates and unknown quantities of water.
The fuel passes through the water separator which removes the large particulate contaminates that could damage or jam the gear rotor fuel pump. The fuel, with only entrained air/vapor and tiny particulate contaminates remaining enters the fuel pump.
The fuel, now under positive pressure flow, enters the fuel filter. As the fuel passes through the filter media and the remaining particulate contaminates are caught and contained, the entrained air/vapor is also separated. Through the positive fuel air separation features of the patented AirDog II-4G the separated air/vapor is discharged from the filter and back to the fuel tank through the Primary Air/Vapor Discharge Port.
The fuel passing through the filter media is now free of contaminates and power robbing air/vapor. At pressures and flows able to meet the needs of the engine, it exits the fuel filter through two passageways. First, the fuel for the engine passes into the fuel pickup tube and on to the engine. Then, the excess fuel not needed by the engine recycles internally through the pressure regulator back to the water separator.