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I may be wrong but I think it is pretty important to get a BOV that recirculates. I've noticed that the ECU is quick to set off a CEL and getting a BOV that vents completely to the atmosphere would probably not only make your car not run well but would almost definately set off the CEL. You may not get as loud off a WHOOSH that your looking for but your car will run a butt load better with a BOV that recirculates.
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