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09 335i Tune Prerequisites
Just acquired a CLEAN 09 335i (dream car) and have been doing endless amounts of research..
Would like to some minor modding but not get too carried away.
I want to go ahead with the JB4 but want to know if there's anything I should prior to throwing the JB4 in to avoid any issues as this is my daily driver.
Was looking into walnut blasting before?
Any feedback would be appreciated.
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