Are you tired of looking at your aquarium check valves in your engine bay? If you are, then upgrade to the Blox MAP bypass valve. This bypass valve will eliminate those troublesome check-engine lights associated with forced induction applications. It also protects your factory MAP sensor from damage occurring during high boost applications. BLOX MAP Bypass valve, Type B, 88-91 Civic Z16/B16/D16, 90-93 Accord, 86-96 Prelude H22, 99-04 S2000 F20C