maddzz1 Posted June 25, 2010 Share Posted June 25, 2010 A friend asked me to get some recommendations for spark plugs for his Denali. It is the bigger Vortec V8 Link to comment Share on other sites More sharing options...
kro10000 Posted June 26, 2010 Share Posted June 26, 2010 OE AC Delco plugs, don't fall for the new trend of "improved" design plugs (aka bosch plus 2/4, E3 etc) I would only run the factory type delcos Link to comment Share on other sites More sharing options...
WBKrazy Posted June 26, 2010 Share Posted June 26, 2010 :agree: Delco FTW! :rotf: Link to comment Share on other sites More sharing options...
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