Hi, I recently acquired a 2001 acura nsx automatic na1 and have some questions about which ecu to use for the auto to manual swap. The main question I have is which manual ecu do I use if my car is a 2001 nsx na1? To my research, na1 was produced between 1991-96 for manuals and all auto nsx's (regardless of the years) are na1 with the depowered engine. Since 97-05 nsx's manuals came with the 3.2 liter, my guess is that I can't use the ecu's from 97+. Another thought that I have was to use a ecu from a manual 95-96 nsx. Correct me if I am wrong but the 95-96 ecu's are obd2 and still had the 3.0 engine in manual, thus I think might work for my 2001 nsx since it is also an obd2 with the 3.0 engine(besides the cams and springs). Another question that I have is, do the 95-96 obd2 ecu's share the same female plugs as the 2000+ nsx's ecu plugs? For example, the integra came in obd2a 96-99 and obd2b from 2000+. the plugs are different but a simple jumper harness can be used to use an obd2a ecu on an obd2b chassis. I do not know if the nsx's is also like this and would like to know. I am in California so being able to pass smog will be a plus, but if converting my 2001 nsx to a manual will not pass smog then that's also isn't a issue. Sorry for the loads of questions but being able to finally own my dream car has me really hyped for the future. I am new to the nsx platform but I am ready to learn. Thanks for reading my long post.