Easily monitor your fuel pressure with this plug & play kit The FAST™ Fuel Pressure Gauge Kit is designed to fit most aftermarket billet fuel rail kits; especially the FAST™ LSX Fuel Rail Kit. It installs conveniently on the end of the fuel rail and makes for an easy way to monitor fuel pressure, which is critical to achieving ultimate performance with your fuel-injected engine. With its black gauge face, liquid-filled internals and easy to see indicator needle, it’s easy to read and durable. Best of all, the high-quality, heat-resistant silver casing delivers an ultra high-tech appearance that enhances any engine compartment. The FAST™ LSX™ 0-100psi Fuel Pressure Gauge Kit features everything you need, including the LSX™ 0-100psi Fuel Pressure Gauge (Part #54027G) and the -8SAE to 1/8-inch NPT fuel pressure fitting (Part #54027A). Full instructions will get you up and running in no time. Best of all, you’ll never have to guess as to the state of your current fuel pressure ever again.