AFR 210 Spark Plug Question
I went from a TR6 to a BR7EF and lost zero driveability. In fact I'd have to say it actually runs better.
I'd at least go to a NGK TR6 gapped at .035. I'm a firm believer that when in doubt go to a colder plug. If you change plugs and something doesn't seem right just swap back. If you don't notice a change then you made a good move.


