APEXI AVC-R Boost Controller Silver Model (420-A004)Product Name AVC R Boost Controller (Silver Model) Code No. 420 A004 Product Description The AVCR 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 AVCR, period. Despite all of the complex features included the unit, the AVCR is flexible enough to be used by beginners. Entry level users