In terms of whether it does anything other than making sound, we'll have to see. I suspect at stock boost levels it won't. But at higher boost levels it will help hold boost better. In any event it looks and sounds good, so we're moving forward with a small batch of 25 units.
Kit will include the plug and play adapter, authentic Tial BOV (with serial number! Lot's of counterfeits out there) with correct spring for the application (spring rate TBD), and caps for the factory DV tubes. Have not finalized pricing yet but shooting for the $429 range at least for the first 25 kits.