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View Full Version : Denso vs NGK

A Rios
04-14-2008, 08:18 PM
Does anyone know which of these two iridium spark plugs works best in the E36 M3? Or if there is an even better alternative available?
ffej
04-14-2008, 10:43 PM
Until you crack open the motor and *build* it, there isn't anything to be gained by using anything other than stock NGK plugs