This fitting is designed to be used with K-Tuned K-Series Fuel Rails. It has a 1/8 NPT port designed to fit our gauge and -6AN Port for feed or return fuel line. This is great for someone looking for a clean look. The fuel line is almost unnoticeable beneath the gauge.
The fitting is soft mounted on the underside of the rail with o-rings, to eliminate the possibility of dangerous fuel leaks caused by the vibration of the engine unlike other rails where the gauge is hard mounted. Due to the size of the fitting you may need to remove the fuel rail to install the fuel line.