Forge Motorsport Twin Dump Valve Kit

[ZAB]

hi guys
         in abit off a rush soo a quick post just cam across this on ebay, how well do u guys think this set up will work, will it give out a double puuushhhh ?
always wantd 2dunp valves

check it out  

http://cgi.ebay.co.uk/FORGE-MOTORSPORT-MAZDA-RX7-TWIN-DUMP-VALVE-KIT_W0QQitemZ8047018836QQcategoryZ72205QQrdZ1QQcmdZViewItem

like to hear u guys opinions cheerz
Zab