Upgrading the stock bypass valve on the Mazdaspeed3 has shown to have a large improvement over the leak-prone stock valve. The TurboXS RBV (Recirculating Bypass Valve) is a heavy duty direct stock bypass valve replacement that will not leak under stock or increased boost levels, due to its heavy duty valve spring and adjustable spring tension. The TurboXS RBV valve is a recirculation only valve and will not vent to atmosphere or produce characteristic atmospheric blow-off valve sounds. This kit includes the TurboXS RBV valve with integrated Mazdaspeed3 specific flange, installation instructions and spring shims.
Part number: MS3-RBV
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