Rutager,
I recently bought one of the FAST IAC valves. this is a GM style IAC valve in a machined assembly that includes the filter. It is a 4-wire stepper and I got it working pretty well in very little time......using a MS2,3.57.....
This unit, just by luck, threads directly onto the RHD vacuum manifold that I supply.....very tidy install and works well.....I'll post a pic, once the wiring, etc. is finished.
regards,
al
PS: the unit i received is all black...no shiny valve body on mine.....