And Vise Versa, The Z32 Airflow meter plugs into the r32 ECU with a slight wire change and with a simple re-program of the EPROM, your way. I think from memory, upgrading the R33 ECU requires a daughter board which I think is expensive. So I think an ECU change would be on the cards. But don't get me wrong, the stock ECU works well some fine bolt on mods, FPR, SAFC etc. I still prefer the 33 because it has more balls low down in the rev range but it is cumbasin. But I do like the sudden rush when the 32 comes on boost and it's agile.