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^^^
Because it contradicts everything I know about mostly stock H22's.
I can see 2.5" gaining power with an aggressive header and high flow cat/testpipe on a race tuned engine, but not on a street engine with the OEM header and catalyst still in place.
I could be wrong, but then I want to see some proof so I can learn something.
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Prelude Tribute Videos Ver 1 and Ver 2
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