The SU carburettors fitted to all Minor models were supplied without air filters attached, something that very shortly after the Minor ceased production was considered a necessity by car manufacturers. This topic is currently receiving an airing on the Network’s forum pages where practicality, innovation and what seems like quantum physics are playing out on one thread. In this photo Joe Rayner‘s innovative approach (left & middle images) go head to head with the more traditional method adopted by Trevor Wilkinson (r/h photo).