The 09+ Hemi's require stock plugs. They are made for Dodge by NGK and have a unique taper. Any other plugs will in the long run end up giving you error codes.

I do them in my 09 Challenger R/T every 30k-ish and it is never an issue. No problems getting them out or getting access to them.

Just make sure the plugs are all gapped correctly, as I usually get a few that are too small from shipping.