So I know there have been threads on spark plugs before, but all I want to know is which ones are in the 2.4L.

As far as I can tell, AC Delco makes ones with part number 41-103. The GM part number is 12599232. But I can't find any specific information on the plugs. I wanted to maybe replace mine (just for the sake of doing it).

Anybody replace theirs yet? What have you used? And is there an NGK plug that will work?

 

if I am not mistaken, my dealer looked up and the 2.4L have AC Delco platiums in there. I was in the same boat. I have a 06 SS 2.4L. And I ended up changing my mind and staying with the stock ones for right now. I would do the same, unless you play on doing a turbo, or other forced induction.

 

Plugs won't make a difference unless you're going FI or NOS... they're like $30 for a top of the line set... save that mod for later.

 

Haha.. I know this. I'm just trying to find the damn numbers.