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Gapping any iridium plug is a very sensitive operation. It is not recommended with traditional "garage" tools. Any gap +/- .10 from the spec should be fine.
Gapping any iridium plug is a very sensitive operation. It is not recommended with traditional "garage" tools. Any gap +/- .10 from the spec should be fine.
I also just brought the NGK Iridium Plugs for my 2003 Corvette Coupe. My car currently have 8,500 mile on it. Before that, I had the Bosch Platinum 4 install at 7,000 mile. Were you able to tell the different in the "Performance at all with the NGK TR55IX?" This question to anybody that can help.