2016-2021 Honda Civic 1.5T MAPerformance BOV Block Off Plate
Plugging and sealing the factory Civic Si 1.5T diverter valve will set you up for future mods, including the mounting of a new, higher volume/higher pressure BOV elsewhere in the charge pipe system. When making any kind of performance enhancing mod, you should always consider upgrading the BOV/BPV, and this is ever more true with the Civic Si 1.5T. Not only is the factory placement unstable for increased boost, you'll also risk ruining the weak, brittle factory BOV.
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