Well yes, you do need one if you're trying to pass Arizona emissions. The twit put a pair of vice grips on one of the lines during the test and broke the nipple off! They said tuff luck, it must have been ready to break ... can't argue with the state here without getting a sheriff involved (or the swat team if you raise yer voice!).
Anyhoo ... to answer my own question, yes the Stanza carbon filter will work fine .. it's the exact same unit except for one minor detail ... the botton 1/2 inch ID nipple is a right angle instead of straight down. I had to buy about 7 inches of new hose for for it to connect properly.
- Brad
Still working on my 240sx in the Phoenix summer heat ... couldn't pick a worse time
