Chirco performance offers several combinations of main bearing sets for all Air Cooled VW's , main bearing sizes can be a bit tricky as cases can be aligned bored 20 over, 40 over, 60 over, as well as 80 over . Then you have crankshafts that can be ground 10 under, 20 under, 30 under, 40 under , so you get a pretty good idea of how many combinations of main bearings are available. Please feel free to give us a call with any questions concerning proper Air Cooled Volkswagen engine bearing fitment
