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Old 04-05-2012, 10:35 AM   #119
1turbofocus
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The Autolite AR series plugs are the ONLY way to go in my opinion , the Denso Platinum TT also my opinion are crap anything Plat. Irid. will last longer but are a hotter heat range and not a good choice for Performance

Yes you have to change the AR sooner then a Plat. but many go 30,000 miles before changing them

Tom
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