Aftermarket downpipes do make quite a difference especially on stock turbo vehicles. The only thing is, as you will feel a difference, to get the most potential out of it it'll probably need a tune to get the ecu to work with it better.
can any one that has done an ECU Tune can you tell me what you notice from it, being a new trax I doing want to just tune unless I know what I am tuneing for
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