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Hey has anyone put in copper spark plugs for the 2.8? I've noticed a huge difference in my friends car going from iridium to copper a4 w/gt28 turbo. Pulls much stronger no doubt but i know they must be changed alot more often. I wanted to try them and see how our car respond to them..
 

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I tried em in my old 9-3 (stage 3+ misfiring w h o r e)
and she didn't like them, what worked for me was actually going with a step colder iridiums....copper has a low melting point vs other metals which makes them ideal for firing but because of this they wear out very quick
 
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