The avc-r is a digital boost controller that allows the user to modify the boost pressure level on turbocharged vehicles. while there are many boost controllers on the market, none of the other includes as many features as the avc-r, period. despite all of the complex features included the unit, the avc-r is flexible enough to be used by beginners. entry level users need only to input a desired boost level and the avc-r’s trademark self learning cpu processor does the rest.