On eBay: JDM TWIN TURBO ARC BLOW OFF SET Z32 300ZX ETC

2 Japanese ARC after market, Japanese Domestic Market blow-off valves. Good condition. A few little marks. You can judge the condition with the photos. These are universal blow off valves. Just need to fit it to your pipe The pipe (flange) is designed for a Twin Turbo Z32 300ZX. The pipes (flanges) are 2" outside diameter on one end and 2 1/2" diameter on the other. Both valves and pipes are identical. Just unscrew and can be mounted to any pipe. Use them on your Twin Turbo or keep one for yourself and have a spare. The ARC Blow-Off Valve protects against compressor surge. This is done by releasing the pressure of the intake side of the turbocharger while stabilizing it, creating greater response and extended turbo life. Designed to replace existing compressor by-pass valves. Very difficult to find in such great condition. A functional item and a work of JDM art. A conversation piece. Very popular with the all the performance enthusiasts here in Japan.

http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=601183979&r=0&t=0