88dunerider
03-25-2010, 10:30 AM
just curious what sparkplugs you guys are running with the 440 kit
NacsMXer
03-25-2010, 04:40 PM
Run the NGK DPR9Z if it's over stock compression, which i'm sure it is. It's one heat range colder than the stock DPR8Z plug to prevent detonation.
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