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Registered User
Join Date: Jun 2004
Location: Lafayette.Louisiana
Posts: 553
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Here is the chart I found...
http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf
So according to this chart...8's are cooler than 7's etc. But I guess this does not carry over to Bosch plugs.
Are my BP8ES cooler than WR7DC?
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Phil
2005 GT3 Milltek Exhaust/ECU reflashed/OEM Short shift
1988 911 coupe (GP white) Turbocharged
1998 BMW 328i
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