Only thing that is different between B3 speedos is if it does have or doesn't have trip computer and/or auto check, and, also, tachometers [2v engines have 6,2k redline, 4v 7k redline, and also R4 and R5 speedos differs electronically] and speedometers [A80 have 220 kmph, A90 260 kmph], but speedometers and tachometers are interchangeable, so u basically need B3 speedo with trip computer [and auto check, if u have it].
P.S. What's wrong with your speedo?
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