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  1. Afe intake weird clunk sound

    F150 Ecoboost Builds
    Hi everyone new to the ecoboost forum, hoping someone can give me an answer. I put a Afe cold air intAke stage 2 dual filters on my 2012 ecoboost fx4 super crew. I definentally feel a slight increase in power and acceleration despite what people say about CAI's. But at low RPMs I hear a clunking...
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