hey guys, approximately how much power would i/h/e with ecu tune pull and how much i/e with ecu tune pull? reason why im asking this is maybe i could skimp out on buying headers if the gains are minimal. I have read somewhere that jdm ep3 headers are already efficient thanks to its 4-2-1 design but i like to hear from other ep3 owners perspectives. Thanks alot
(yes i am a cheap bastard)
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