blowoff valve?
 

i got a standard uk 93 rx-7! which blow-off valve do you think is best? i'm leaning towards the greddy!

Stock is fine. If you're looking for more sound, take off the piece of hese that runs from the airbox to the BOV. This will cause the BOV to vent to the atmosphere rather than into the airbox (or intake). Spend your money on something else, like a Greddy intercooler piping kit and elbow.

I dunno that the stock BOV is efficient enough. Meaning, I don't believe it vents enough boost, quickly enough. I will be purchasing a new BOV very soon, as the stock bovs just do not cut it.

And your basing this statement on....? Unless you're running a single or boosting big numbers, the stock one is fine.

the stock BOV's are fine if you are running close to stock boost levels.