Injen calls their intake and exhaust system "MR technology tuned" system, which basically means that they released an intake/exhaust that is factory developed to work on your vehicle without the need to re-tune your ECU to cope with the extra air flow.
How they do it? I have no clue, but yeah, no post tuning required.
thats not what the" tuned" intake means, it is sized in dia.and length for the size and rpm of the engine so it will work with the engine and your foot.toosmall don't work to big dont work. but there is still a helps and dosn't help aera in the rpm range ,they tune it to max the helps range & decrease the dosn't help range.