The 40mm Fuel Pressure 0 - 100 Psi Gauge delivers precise, reliable readings essential for tuning and maintaining your performance setup. Featuring a 1/8 NPT thread and liquid-filled construction, it ensures durability and accuracy under demanding conditions. Designed to suit TAARKS Fuel Pressure Regulators and compatible with other brands, it integrates seamlessly into your fuel system. Please note, the gauge may leak during transport—ensure the white pin is pushed in and the gauge remains at least 3/4 full upright for optimal performance. At Culture Automotive, we provide premium parts built by car people, for car people, helping you build more than machines—we build culture.