Spark Plug Help

[Drenis]

Alright, Going to be replacing the plugs in the car with some new ones.

Rather then have people just tell me what are good plugs to go with I have decided to go with AC Delco Copper Plugs. However I was givin 2 plug models and 2 GM part numbers aswell. I need to know what the difference is between the two before I purchace these...

However if someone would like to suggest a better plug? By all means suggest and give reasons for it.

*NOTE* This summer I was getting up to 12* of KR with a OBD-II scanner.

Gen 3 3400 (03' year) with a couple modifications, Nothing internally.

AC Delco = 41-601, GM = 5614284
AC Delco = 41-606, GM = 5614303

Keep in mind these were crossed with a Autolite Copper plug. And I seem to have also seen that these cross with a NGK TR55 aswell?

[geoffinbc]

One is most likely Platnium and the other is a Rapid Fire or possibly Iridium.

Call your dealer and ask it will say in the computer.

I run iridium plugs and love them.

[Drenis]

Boy this site has really slowed down... Seems like there was more freaquent posting back in the last 2 years.

better:
These part numbers came from a GM dealer who couldnt tell the difference.

[geoffinbc]

Tell the parts boy to get off his ass and go look LOL... It will say right on the screen what plug is what. I have seen it myself. If not I can check for you monday and let you know the P/N

Or try www.gmpartsdirect.com

[Drenis]

Well as you can see I posted the GM part numbers. It's just we can't figure out the exact different between the two plugs exactly.

I think i'm just gonna say fuck it and buy the TR55's (Copper) and forget the Delco plugs as they are the same according to the research I have done.

[geoffinbc]

Delco makes great plugs. Run them you wont regret it.

Another thing your dealer can do is enter your vin and it will give the specific P/N of the original equipment plugs.

Both numbers in GMPD show a price of $2 retail. So right there I know it is not platnium. They are most likely rapid fires.

[Drenis]

I shouldn't have any issues with the rapidfire plugs eh?

Also what is the gapping required for the 3400? I can't remember what the plugs are supposed to be gapped at.

[geoffinbc]

No you wont. However I would run Platniums. They will be good for 100,000KMS and run better.

[Drenis]

Not interested in that Plats. But thanks for the help.

Do you know the proper gap? I think it's .045"

[geoffinbc]

.060 (it will say on your emissions sticker)

Make sure you get the rapid fires. They will have a smaller electrode than the conventional plug. They will only be slightly more money than regular plugs.