My neighbor moved to N.Y and left this box of crap in my garage. Anyway It is an air box Thats about 12"X 15"X9". It has a little sensor on it that tell you when to change the air filter. It hose is about 4" in diameter on the top that leads to what appears to be the TB with 2- 2"X4" slits on the bottom side. I have looked at every part store I can think of.