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  1. schmidtyty

    Spark Plug Data Base

    i just got a 2012 speed 3 with 71k on it and i planning on driving it from Seattle to LA this summer when the only mod i have is an AEM intake that came on the car and an access port that i just got (debating on fuel pump internals) should i go with the Colder or the stock heat NGKs?
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