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      08-02-2012, 04:20 PM   #2
ECSTuning
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ILZFR6D11 is the NGK part number for the NGK plug found in the N52, BMW part number 12122158253

FR7NPP332 is the Bosch part number for the Bosch plugs found in the N52. BMW part number 12120032138

NGK PLZFR6A11S is also a common plug people will 'upgrade' to in the N52.