The Best spark plugs for the 3.9?
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I was just trying to get a idea of what to get..I'm gonna pull the Platinum 4+'s out soon and see what they look like, it still runs damn good.. They Practically give those Autolite plugs away, if theres any thing close to a problem with those Platinum 4+"s I'll easily spend the few dollars to get a fresh spark..
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Autolite 3924 are not listed for any Dodge. But they are made by manufacture to be 1 step colder then stock ones. You have to ask by part number like I said in my first post. It will NOT be in the books. They are cheep too.
This is best plug for ANY and ALL Magnum engine. And I believe 4.7's and the newer V6 what ever the size is, this is the plug of choice too.
They did make a difference in my 5.9 Magnum when changing them from the Bosh Platinum +4's
This is best plug for ANY and ALL Magnum engine. And I believe 4.7's and the newer V6 what ever the size is, this is the plug of choice too.
They did make a difference in my 5.9 Magnum when changing them from the Bosh Platinum +4's
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I use Autolite 3923's in my truck. You can get them for $3.00 for 2 plugs in a pack at Walmart. They are one heat range colder and will help with pinging if you have any. My truck runs great on them. I have tried other plugs including NGK and 3924's but I always go back to the plain old copper core 3923. It has performed the best in my 3.9. I change plugs, my distributor cap and rotor button with Napa part #'s MO 26 and MO28 brass contact cap and rotor at every 20,000 miles, I change my plug wires out every 40,000 miles. I use the Belden Premium wire set from Napa, about $36.00 here.