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Im saving up for one for my 6s and need to know if it would be better for me to get a non-tunable or tunable one?
I believe that the tunable version lets you change the mapping of the air/fuel ratio... not entirely sure on this, but from what I read on these forums back in the day when I was contemplating your same issue (non-tunable or tunable) this is what I believe is true. I don't think you can adjust anything from the ECU... our ECUs are very user-UNfriendly.[/b]