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Software tuning or a header+racerom
A noob question here.
What is the best way to get rid of the torque dip in the OEM 17+ BRZ.
Just software tune or is it really necessary to get a header setup?
Does the header actually allow you to still pass State of CA smog inspection, with say a switch back to a map that will allow for this? Or how does passing smog work?
Thanks!
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