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#4
02-14-2004, 06:32 PM
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Re: AC Delco R44 spark plugs vs R43
R44's are 1 step hotter. They are a little easier on themselves because you usually lug the cars around at shows. Solid lifter motors are more prone to plug fouling I feel. I use Autolite in my 1969 Z/28. Use the 43's and 44's at shows. No big deal.
 JMO Sam
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