I have a brand new 131 racing diff for sale. However please read that link to a recent post as it apperars there are (suprisingly) 2 different type of axle.
I purchased one at xmas thinking it would fit my RHD 131r. It did not and Bacci Trasmissionalle who sold it to me refused to return my ?1000.
This prompted a discussion and some very helpful comments & pics but no conclusion was achieved.
It seems the LHD 131r has a different axle and driveshafts from the U.K version.
I have for sale, i believe, the LHD one but please, please check this thoroughly before making any purchases. Any enquires please to
r3bel299@gmail.com.