50-50 Recirculation/vent-to-atmosphere valve for a VTA sound at peak boost, and a quiet operation at low boost Billet...
EM stands for Electro-Mechanical Plum Back (recirculating) version Ideal for newer vehicles that require an electronic diverter valve...
EM stands for Electro-Mechanical Dual Port model Ideal for newer vehicles that require an electronic diverter valve Features...
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