I'm top swapping my gt soon. I have NGK TR6 plugs already installed with less than 4k miles on them but for a lot of top swaps I see people talk about 104s? So which one is better? Which is colder? Etc
Thanks!
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I'm top swapping my gt soon. I have NGK TR6 plugs already installed with less than 4k miles on them but for a lot of top swaps I see people talk about 104s? So which one is better? Which is colder? Etc
Thanks!
AC DelcoFactory Replacements: Stock
Autolite 606: Stock
Autolite 605: 1 Heat Range Cooler
NGK TR55: 1 Heat Range Cooler
Autolite 104: 2 Heat Ranges Cooler
NGK TR6: 2 Heat Ranges Cooler
Autolite 103: 3 Heat Rangles Cooler
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