Fuel Pressure Gauge - Liquid Filled (0-100 psi)Applications: All K Series engines Universal Note: * Also check out our 1 8 NPT 90 deg and 45 deg fittings that can be used to change the angle of the gauge to make it more visible. K Tuned Fuel Pressure Gauges are liquid filled to prevents failure due to the vibration and constant movement of the engine. The liquid filled (shock proof) design ensures the needle remains steady while the engine is running. Cheaper and less accurate fuel gauges are