Well like the title says, I am running stg 2 with a 2.85 pulley. Anyways i had the stock plugs in every since I put stage 2 in my car. Then decided to go 1 step colder plugs (BKR7E) i believe and its a night and day difference. My car used to run a little jittery in the morning and now she runs fine. I also felt like it made a big difference in acceleration. My car also just feels like it is burning the fuel 100% better. So if you havent got plugs they are a must. Ok, Im done with my rant now.

 

Good to know. Thanks.

 

No problem. I didnt think going one step colder would make that much of a difference but i was way wrong. I just decided to give it a try cause my car was kinda jumpy in the morning esp when it was cold. It may have been just my car but anyways, i got them from CA and they were only 14.99 shipped and it was by far the best modd i have done so far.

 

Yeah colder plugs are a must.
You should run colder plugs with any pulley GM stage 2 and smaller.

 

I was gonna go with the Iridiums, but most of the people were telling me to go with the copper so I did. From what i hear they dont last to long but for only 14.99 shipped it was well worth it.

I figured changing them out every other oil change.

 

You can also get (BKR7E) from napa for around $9.00

 

whered you get them from? i may give em a shot

 

Yea I tryed napa and auto zone and they were out. Thats what i get for living in a small town.

Cobalt-addiction.com 14.99 for a set. Best thing ive ever done to my car.

 

the colder plugs definately make a difference...

 

do you need to gap them or they come pre-gaped?

 

They come pre-gapped but I still checked mine and made sure, and you still might have to adjust them but mine were fine just the way they came.

 

if they need adjusting....what size gap?

 

an0m has a good how-to on it right now and he seems to know his ****, it will tell you everything you need to no, but they should come just how you need them

ps... its a sticky

 

I had the NGK's in my car and wasnt to happy with them. I went back to stock and the car runs great. It could have been the gap (I had the NGk's at .038) but I dunno.

 

Well every car was different, but going one step colder was a night and day difference. I also had my stockers till just now so i had about 22,000 on them.

 

what bran of plugs does GM install? or they just "GM" plugs?

 

My stockers were ngk's but not same as the ones i ordered from cobalt addiction

 

I believe they are ACDelco plugs which have been rebranded "GM"

 

My stockers had NGK stamped on them

 

Yea the stockers are NGK