Is the Fuel Pressure Big Line Kit required for installation?

The answer to this question will vary depending on the vehicle you are installing your Fuel Pressure Gauge on and the type of fuel system (factory or aftermarket) being used. The Big Line Kits are only required for 2007.5-2018 Dodge Ram 6.7L Cummins and 2011-2016 Ford 6.7L Powerstrokes that still utilize the factory fuel systems. These kits are designed to replace the restrictive line running from the fuel filter housing to the injection pumps and replace it with a larger ⅜” line providing a port for a Fuel Pressure Sensor to be installed at the same time. 

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