X-metal is single blade. The picture on Roe's website shows single blade as well - don't know if it'sa the same. Some vendors has the dual blade throttle bodies also. I'm considering to install the throttle body too - either x-metal or some other vendor's. There has been multiple threads about idle hang too and does it really give any extra ponies or not. Would like to hear some more feedback.
....and not intention to hijack Demoes4x thread, but if there are any Throttle bodies sitting around after his need has been fulfilled, shoot me a PM.