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  1. Ahhh! I Can't Decide! CS SRI+CAB vs K&N 69 Typhoon w/shield

    2014-2018 Mazda 3 Skyactiv Engine and Performance
    I've been reading a bunch of the threads on the CS SRI and CAB and that the the cold air box may restrict airflow and quiet down the SRI sound. The K&N looks neat too and I read that it sounds awesome. But I live in Oregon which adopted California's emission laws, which means the K&N isn't...
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