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Why do WRX had 3 cats and STI only has 2?

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Old 11-08-2004, 06:08 AM
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Why do WRX had 3 cats and STI only has 2?
Maybe I missed it but why do WRX have 3 cats and the STI has 2? Is it to give the STI more of a performance advantage? Just wondering , Thanks
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Old 11-08-2004, 06:18 AM
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does bthe forester xt ant Legacy GT 2.5 turbo have 2 or 3 cats?
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Old 11-08-2004, 10:15 AM
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Probably a very simple question; dynamics of adding forced induction to an RS2.5 eng




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