Guardian Angel Overboost Protection [GUARDIAN_ANGEL (0100-0003.3)] - $199.00CAD : Stratified Automotive Controls
This is a device designed by a local tuner in the mazdaspeed community, but will work on most turbo cars. Its primary function is to provide overboost protection. Secondary function is to allow you to run a push/pull style BPV/BOV in VTA mode with minimal issues.