The TRU-BOOST boost controller gauge includes an on-board 29 PSIg pressure sensor, built-in overboost protection with two timed shutdown levels, a scramble boost setting and a low-side output for a warning light. A 75 PSIa boost sensor for high boost applications is sold separately (please see TRU-BOOST 5 BAR Ugrade Kit). AEM’s boost control solenoid is included with the TRU-BOOST controller gauge. It is specifically manufactured for automotive boost applications and will not corrode and stick from exposure to rich fuel mixtures or oil vapor. It is pressure tested to 100 psi and includes barbed fittings and -4 AN fittings to eliminate any chance of leaks. No external interface required for programming! Two user selectable boost settings with peak boost memory Scramble boost setting allows user to momentarily change boost levels User configurable gauge includes 24 scalable LEDs Interchangeable black and white bezel, black and silver pin guide and black and white faceplate to customize look of display One (1) low-side output included for warning lights 52mm gauge diameter AEM’s TRU-BOOST Gauge-Type Controller is an electronic boost controller that combines the simplicity of a manual boost controller with the added ease of adjusting boost levels through a gauge interface. There is no external interface required for set up, and it is fully functional right out of the box. This product may be used solely on vehicles used in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemption (visit the "Emissions" page at http://www.semasan.com/emissions for state by state details).  It is the responsibility of the installer and/or user of this product to ensure that it is used in compliance with all applicable laws and regulations. If this product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund. This policy only applies to installers and/or users who are located in the United States, however customers who reside in other countries should act in accordance with their local laws and regulations.  CLICK HERE TO DOWNLOAD A COPY OF AEM RACE ONLY PRODUCTS BY PART NUMBER. WARNING:This installation is not for the tuning novice! Use this system with EXTREME caution! The AEM Tru-Boost Controller Gauge allows for total flexibility in boost tuning. Misuse or improper tuning of this product can destroy your engine! If you are not well versed in engine dynamics and the operation of boost controllers DO NOT attempt the installation. Refer the installation to an AEM-trained tuning shop or call 800-423-0046 for technical assistance. NOTE: AEM holds no responsibility for any engine damage that results from the misuse or mistuning of this product.