You are right it is a plate with three screws and presure washers.
The plate is a powdercoated aluminum block with four 1/4" holes on the three sides. in the middle of the plate there are two holes. one on the left side with the form of an oval that matches the turbine housing. the other hole is at the center with a + - 1" in diameter, this hole conects to the four holes on the side of the plate but it is blocked at the reverse side of the 1" hole, so it is forced to vent thru the 1/4" holes. It uses the factory valve which I think is the expensive part. it is great that they decided to use it this way, it keeps the cost down and it works great!
Ian
__________________
|