Thread: spark plugs?
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Old 11-18-2009, 04:46 PM
Chevy454 Chevy454 is offline
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Default Re: spark plugs?
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I have used NGK XR5 stock #5953 in my 68 Z with no fouling problems.

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The XR5 would be the standard (non-race) version of the R5670 (race) plug...both are good plugs.
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