Thanks to the participants, who identified my mis-purchased filter as appropriate for the 4 cylinder 4000's and VW Rabbits, which are sure to become rolling collectors' items in another 10 or 20 years. Brian, of Mooresville IN will be receiving his all-expense-paid air filter shortly! Now, I have these BBS RX's with too many lug holes........ yeah, right! -Shane '85 C-GT