Taylor 10.4mm or MSD 8.5mm???
and 1 other question whats the deal with the NGK spark plugs i have seen on there website they have 3 different choices TR5 TR55 TR6 i think those where the ones. Whats the difference and how would i know which one is good for my car?
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I went with TR55IX plugs. The 55's are what most NA guys go with. The IR gives that extra kick in voltage (because it's so thin), but best of all outlasts copper and I think platinum too.






