Blow off valve on MSP?
 

Do MSP's have blow off valves? If they don't can you install one even with all that plastik to0obing? Anyone done this yet?

Mazdaspeed BOV
 

Yes it does, it is a stock rx-7 BOV, it isattached on the right side of the engine(looking at it) it attaches to your hard pipe to the motor, and has a rubber hose back to the intake pipe. You can remove this rubber hose and completely block off the old fitting where the rubber hose went, and you will hear it a lot better. You can adapt a new one, either recirculating or open air, in the same location, you might need to change the flange though. hope that helps.

Kyle Lancaster -- Mystery Mazda Dealer