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If you have an auto you will have drone with any system until you remove the AFM or get headers. I have the Borla S Cat back with ARH headers and I love it. The headers took away any drone. The only time I get a strange hollow sound is when the AFM kicks in. I'm having the car tuned later this month and the AFM will be gone then. I can let you know if there is any difference after the AFM is gone.
Your better off going to a shop and putting it on a Dyno rather than buying your own tuner.
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