Spark Plug Gap

03-22-2008, 10:02 AM

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Spark Plug Gap

What should I gap tr-55's on an 04 ls6....with headers and exhaust. Thanks

03-22-2008, 10:18 AM

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i like NGK's...i'm not sure what the ls6 calls for, I would but whatever NGK it calls for in the cross reference book.

03-22-2008, 10:32 AM

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I would just run them out of the box. I do that with heads and cam + full bolt-ons. Never a problem.