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Hey guys my name's Pete. I just bought a used red 05 Cobalt SS SC a few days ago, I'm just wondering what kind of spark plugs the 05's came stock with? My local parts store can't tell me because there are so many options for plugs. If i have Irridiums I'm not touching them, But if not I want to drop them by 2 heat ranges, Please help me.
 
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