Go Fast Bits Stealth FX Dump Valve Impreza 01+ (GDB).
The beauty of this DV is you can twist the DV stem to vary the proportion of air recirculated and vented to atmosphere.
The spring is also adjustable by twisting the DV cap.
http://www.unit-8.co.uk/acatalog/Imprez ... alves.html
7th DV on this Unit 8 link.
I've had part of the trumpet trimmed off to fit my car owing to installing with a FMIC. I believe new trumpets are available for the more anal of people.
Open to offers.
Boxed.
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