Unless you are racing there really is no need for a catch can. Most, if not all, race sanctioning bodies require a catch can for any part of the car that has fluid in it to prevent spills on the track. If you are using one to replicate a race version of a car, then go ahead. If you think you need one, probably not. On a race ar you will be running the engine at high rpm's for extended periods and could possibly have some
oil in the catch can, on the street that is not likely.