on exchange basis core charges apply oil pressure problem highvolumeoilpump ... for a `75-84 car had 27mm gears the pump #sn1297 has 30mm gears an increase of ... approx 12 which is a lot these 30mm pumps were used in all cars from `85-92 they ... for pre 84 engines in 1993 a 36mm pump came out sn12825 which has about 20 ... bolt up to all pre 93 engines these high performance oilpumps have extended ... gears for increased oilvolume and pressure a highvolumepump can ... move a highervolume of oil a must for all racing applications ... these pumps will bolt into any rabbit® scirocco® ... 75-92 all `85-92 engines come with this pump #1297 already installed it s the ... lifters which require additional oilpump capacity this pump can be a solution to ...