These are the turbo's off the F5B and F6A, and maybe a few other 3cyl models. Wanted one in good working order, dump pipe and exhaust manifold not needed, see this thread for more details. http://www.tamon.org/forum/viewtopic.php?t=467
May also be intererested in slightly bigger turbo's up to RHB4, but no bigger.
Someone also mentioned in my other thread a Garrett GT12 will be another good option so i'm after one of those too
Cheers.