Seems to be the be the new big question for the lsj's iridium or copper plugs? I have had both in my 06 and right now running step colder coppers and i dont know if im sold yet on them. mainly the fact you have to change coppers every 4-5k compared to iridiums longer life.

So what are you guys running? with what mods?

 

This is not a big new question. There are a billion threads on this.

LSJs like copper, end of thread.

 

No.

Some do, and some don't.

My car has always hated coppers.... but, yes there are a million threads about this.

It has been a debate for years. I tested both, and found what my car likes best. You should do the same, if you don't find an answer here.

https://www.cobaltss.net/forums/2-0l...pulley-262730/
https://www.cobaltss.net/forums/2-0l...ge-2-a-212821/
https://www.cobaltss.net/forums/2-0l...-plugs-254497/
https://www.cobaltss.net/forums/2-0l...-i-run-250234/
https://www.cobaltss.net/forums/2-0l...-plugs-245759/
https://www.cobaltss.net/forums/2-0l...-plugs-245145/
https://www.cobaltss.net/forums/2-0l...estion-238781/
https://www.cobaltss.net/forums/2-0l...-plugs-234508/
https://www.cobaltss.net/forums/2-0l...-plugs-225462/
https://www.cobaltss.net/forums/2-0l...needed-225246/
https://www.cobaltss.net/forums/2-0l...advise-222487/
https://www.cobaltss.net/forums/2-0l...-plugs-216222/
https://www.cobaltss.net/forums/2-0l...-plugs-216132/

^See