The MS3-RBV was designed for those who want a replacement recirculating bypass valve that can handle any boost you throw at it. Unlike full vent-to-atmosphere or hybrid recirculating/vent-to-atmospohere valves, the MS3-RBV vents excess pressure back to the intake, preventing any transient rich AFR conditions that can lead to backfiring.
- Mazdaspeed 3/Mazdaspeed 6
The turbox bpv box was in horrible condition. The bpv mustve destroyed its box during shipment, because it was all opened and all over the place inside the shipment bix when I received it. One of the washers has a chip in it causing it to be stuck inside the bpv during installation. It was a pain to get out. The fitting that comes with the bpv to extended the new hose with the oem vacuum hose is too small. The bpv itself works fine.