HI ADRIAN , CAN YOU GET A COUPLE OF MEASUREMENTS FROM AN OLD 4JB1 OIL FILTER I FOUND 4 FILTERS I HAVE HERE BUT 2 OF THEM ARE FOR AN 85 AND 2 ARE FOR 90 91 VERSION AND THE GASKET S ARE DIFFERENT DIAMETERS ALSO IS THAT FILTER THE DUAL STAGE WITH THE CENTER PIPE IN WHERE IT SCREWS ON TO THE ENG, I MAY HAVE THE STANDARD OIL FILTER IF IT IS WHAT I THNIK IT IS , IT LOOKS LIKE THE SAME FILTER THAT THE OLD 4FB1 ENG USE D, IF YOU CAN GET ME A FEW SPECS I WILL BE GLAD TO CHECK IT OUT FORYOU THE 4FB1 HAD 2 DIFF FILTERS ALSO SINGLE STAGE AND DUAL STAGE ALSO THE THREAD SIZE IF YOU CAN ,, JERRY