Re: petrol filler cap on both sides
My car has this and to be honest I did not take much notice when I removed the tank to do some work. The drivers side seemed to have more work done on it, bigger pipes etc, so I am guessing this is the side it should be on. The passenger side fittings were shorter and less complicated but still had two smaller pipes plumbed in along as the filler neck and not sure what they were for. The drivers side filler neck has a very odd angle and petrol will run back out if you donnot fill it up slowly but other people may have this problem too. It is a very handy mod though, hope this helps and just a shame I did not take any pictures.
