• I've got an Air IL and Coil IL. Considering how much you love tinkering with tuning, they're ideal for that.
    The Air IL felt great after a TF Tune service, but probably because every seal and even the air can was replaced due to scratching (they suspected side-loading)
    The Coil has been impeccable so far, tuning it has a more noticeable effect compared to the Air, I've found anyway

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