Please read this manual thoroughly before installation and operation. The exhaust system. controller. - Conﬁgurable boost modes. Manual Boost Controller Miata. exhaust work, Optional boost gauge. MANUAL TURBO BOOST CONTROLLER BLACK MAZDA PROTEGE RX8 RX7 MIATA. BOOST ON! Underdog Racing. For tuning OPEN LOOP you will need a wideband sensor and controller. content of the exhaust and reports to you with a digital.