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Not many people know that fuel rail is an important part of the fuel injection system in your vehicle. Fuel rails are vital components in an inner combustion engine because they have a extremely significant function to perform. For the vehicle to run smoothly, it's quite essential to spray the fuel - air mixture into every cylinder at the precise moment in the cycle.

There comes a time in every modified common rail diesel's life when the stock high-pressure pump can't keep up with the fuel pressure needed from higher fuel demand. This is what happened with the 6.7L Cummins in our '02 F-350 swap truck.

An AirDog II DF-165, 165 GPM unit was chosen to supply copious amounts of fuel to the built common rail. Because of the engine swap, Kurtis had to decide whether to adapt a Ford kit to the Cummins or vice versa. It looked easier to fit a Cummins kit than adapting a Ford kit, especially since a certain amount of plumbing changes had already been made to the Ford on the suction side.