i was driving today and i heard somthing from my car was hanging and scraping the road. so i stoped and looked under my car and i saw that this metal air pipe was cracked and was hanging. im reading the haynes manual and it doesnt give me a name for that metal tube/ pipe that broke. its the pipe thats connected to a check valve underneath and to the cat. does anyone know what that pipe is called? i went to checker auto and they didnt know what it was... anyone know if auto part stores carry this part?