Join Date: Jun 2004
Here is the chart I found...
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?
2005 GT3 Milltek Exhaust/ECU reflashed/OEM Short shift
1988 911 coupe (GP white) Turbocharged
1998 BMW 328i