Re: Spark Plugs for 011' Hemi
The downside is, if you run any plug longer than Chrysler's 36k spec, and you have an issue, you are on your own (unless you can get the plug manufacturer to pay for it). It probably will never happen, but why take the chance when you are still under warranty. When out of warranty, do as you wish. Chrysler's have always been picky with plugs. If they used copper as OE, typically, copper will run best.
2014 Durango Limited AWD in Granite: Premium Package, 2nd Row Captain Chairs, 2nd row Console.