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Quote: Stevenc150:
The only difference between a DCPR8EIX and a DCPR9EIX NGK Iridium plug, is that the (8) runs hotter than the (9) plug. Quote: Maybebuell:
...hotter plug has a longer porcelain the tip goes a little deeper in the head so the burn or heat can keep it clean on a rich running motor....plug itself does not run hotter...the length of the plug in combustion chamber determines heat range
I stand corrected on the NGK Iridium plugs. The DCPR8EIX is a hotter Heat Rating than the DCPR9EIX. Great info Maybebuell.
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