I would change, it's amazing how much better the car runs on a new set of plugs... especially above 12 or 13psi
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2018 X3 M40i - JB4 / BMS Billet Intake
2015 M4 6MT - JB4 / Gintani DPs
2005 M3 6MT - VF Engineering S/C / KW / StopTech / Dinan / HPF Stage III (removed)- Track Toy
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