is it possiable to run as a singal? and wut size are the housings?

 

Anything is possible, but how well it works is another question. They come in a couple different sizes, 71, 75 and 80mm inducers. Exhaust housings range from .80 to 1.32 A/R, according to a quick search from Google. I imagine it would like a lot of RPM, considering the size of the turbine, and since you won't be able to run it as high of pressures as you would in a twin set.

 

There are .90 a/r t-4 housings available for the sx series. An example:

http://www.timsturbos.com/S400sx_Sling_Shot.html