Sweet... how did you cross reference to that? Probably $30 at CAT? I didn't bother to check the price....
Not quite 30$ at cat, but still cheaper on Ebay. The brown tube is the key, for orifice size .047" . Brown = ford, as an example as well. There is box kit of various tubes available as well "all colors / sizes" 26$
4 seasons web site has a lot of information on various applications.