FLlegacy Posted June 3, 2016 Share Posted June 3, 2016 I can say based on my limited experience, if all you have done is axlebacks it does help a little, I went from a max boost of 16.4 to 17.2 with the nameless 5" axlebacks on an ots stage1 tune. But once you open up the rest of the exhaust you will get too much of a good thing. Link to comment Share on other sites More sharing options...
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