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ZO6 Bryan · 09-10-2014, 09:09 PM

NGK TR6 is the same heat range as stock but is a cheaper plug than the Iridium TR7IX. And the 7 is colder if you are running increased boost. The OEM calls for Iridium in the cars.

09-10-2014, 09:09 PM	#11
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	NGK TR6 is the same heat range as stock but is a cheaper plug than the Iridium TR7IX. And the 7 is colder if you are running increased boost. The OEM calls for Iridium in the cars. __________________ Bryan 2018 ZL1 M6