Before you do that have you changed spark plugs?
Had the same issue with my 06 frontier and plug change solved it. At 107k it is time anyway. Also get the oem plugs from ngk.
Had the same issue with my 2006 Frontier a couple years back. In short before you dump $$$ into cats change your spark plugs if you have not done that. Go with the stock NGK and do NOT attempt to check gap you can scratch the coating on the plug and mess it up. Don't ask me how I know this...
I am sure someone has done it.
As you know the trailer light attachment hangs below the bumper. I have torn mine off on my pickup so want to reloace them on both my xterra and frontier. Can you adapt the existing one to fit in the bumper after drilling a hole or do I need to rewire an...