The Aem boost gauge is the best in acuracy and performance that gives you control, and has a analog interface wich is easy to read. these gauges also offer a 0-5v analog output for use with data loggers and virtually any engine management system, such as the aem ems or fic. the boost gauges also has features that has a aem 35psi brass sensor, that is what makes these so acurate and even comes with a seven color back lighting that will allow you to match other guage cluster colors  each gauge comes with interchangeable black & silver bezels and is available in black or white gauge faceplates. egt aem egt gauge unites unsurpassed accuracy, speed and control with an easy to read, analog interface. the aem analog gauge also offer a 0-5v analog output for use with data loggers and virtually any engine management system, such as the aem ems or fic. the egt gauge features a k-type thermocouple, making it among one of the fastest and most accurate gauges available. the backlighting is user adjustable to 7 colors, allowing users to easily match the egt gauge to most factory gauge clusters. each gauge comes with interchangeable black & silver bezels and is available in black or white gauge faceplates. wideband air/fuel aem wideband air/fuel gauge unites unsurpassed accuracy, speed and control with an easy to read, analog interface. the aem wideband also offers a 0-5v analog output for use with data loggers and virtually any engine management system, such as the aem ems or fic.