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k&n air filter
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  1. Engine Performance
    Hi all, Im new to modding and new to the site. Im a little scared to ask Cobb directly (for biased reasons) but what is the problem or what would the pitfalls be to running a stock WRX 15 with just a catted JPipe Mod and K&N High Flow filter without a tune? (restrictor pill removed too) I...
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