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Dream240, don't respond to this thread anymore because it's obvious that you don't know what you are talking about.
3" makes more power on NA then 2.25". It's dyno proven. Alex chang did back to back dynos with both diameter exhausts on a KA. 2.4L KA's push a lot of exhaust and love 3" exhausts. Maybe you are used to driving hondas or other small displacement I4's and all your information comes from that camp but it has been proven that it doesn't apply to the KA.
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