Hey everyone I'm thinking about changing my spark plugs on my 09 SS, should I get OE ones for it and if so what are the OE plugs ? , iridium ones ? Or should I get the next size colder plug , the car is stock, pretty much just has a muffler delete and K&N filter thanks for the help

 

This has been discussed endlessly. You want the stock AC Delco plugs gapped at .032". They should be that outta the box but get a feeler gauge just to be certain.

 

^ What he said, and also, you don't need colder plugs until you get alot of mods on her. Sometimes even then, some guys prefer the stock plugs; but I personally think it depends on how the individual car reacts to modding, or it may be the local fuel availability as well. I had to go 1-step colder for basically fully bolted, and have gone 2 step colder for adding a ported head with cams on top of that. Our fuel up here sucks too, so it may have somethin to do with it.

 

Get OE, they work the best, end of story

 

Stock. End of story.

 

^^^ This. Definitely check them with a feeler gauge though, because I bought some replacements and 1 out of the 4 was gapped at .028 maybe they dropped it lol. I regapped it to .032 with the rest of them as mentioned and never had any issues.

 

I thought the OE plugs were gapped at .35?

 

just pick up one of these at your local gas station. cheap. and most power out of it!
make sure you gap it at .32" as well as the stockers