spark plugs

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Aug 11, 2009 | 09:38 PM

dobewillie

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From: lockport n.y

spark plugs

Can anybody tell me the plug that was used on A new 02 non z a-4

Aug 11, 2009 | 09:40 PM

VinnyT

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From: Rocky Mount Virginia

I would say Delco 41-985's

EDIT: They are now 41-110's

Last edited by VinnyT; Aug 11, 2009 at 09:43 PM.

Aug 11, 2009 | 10:36 PM

rws.1

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From: Lake Havasu City, AZ

from Gene Culley www.gmpartshouse.com
12621258 – GM AC Delco Iridium spark plugs – 6.47 each

Aug 11, 2009 | 11:23 PM

Jet-Jock

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From: Lake Mary Florida

Quote:

Originally Posted by rws.1

from Gene Culley www.gmpartshouse.com
12621258 – GM AC Delco Iridium spark plugs – 6.47 each

That is a smart upgrade.

Aug 11, 2009 | 11:44 PM

happa

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From: Simpsonville SC

or if you like NGK go with TR55, very nice plug, ran them until I put nitrous on the Vette and now I run NGK TR6

Aug 12, 2009 | 11:52 AM

Vetteman Jack

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Quote:

Originally Posted by rws.1

from Gene Culley www.gmpartshouse.com
12621258 – GM AC Delco Iridium spark plugs – 6.47 each

That's what I would go with.

Aug 12, 2009 | 12:14 PM

csexton

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Joined: Jul 2004

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From: Danville Virginia

Quote:

Originally Posted by rws.1

from Gene Culley www.gmpartshouse.com
12621258 – GM AC Delco Iridium spark plugs – 6.47 each

Worked well for me before I went with my supercharger.

Chuck

Aug 12, 2009 | 04:42 PM

robsc501

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From: LEBANON PA.

HI There:
If you asking what the original plug was from the factory. It was denso ptj16r15 , gm 12563707
robsc501

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Aug 12, 2009 | 08:24 PM

Gene Culley

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From: Reading PA

Thanks for the referrals guys. You are the best. This 12621258 number just came out within the last couple of weeks. I wonder what the diff is?

Aug 14, 2009 | 09:41 PM

#10

Jet-Jock

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From: Lake Mary Florida

Quote:

Originally Posted by Gene Culley

Thanks for the referrals guys. You are the best. This 12621258 number just came out within the last couple of weeks. I wonder what the diff is?

Can't be asking us, we ask you these questions

So what's the diff?

Aug 15, 2009 | 08:40 AM

#11

silversport

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From: Chicagoland Illinois

OE was an AC Delco platinum with pucks...my 2001 has Denso platinum mentioned by robsc501 (IIRC Delco was on strike or parts problem) from the factory...

Aug 16, 2009 | 11:56 AM

#12

Gene Culley

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From: Reading PA

Quote:

Originally Posted by Jet-Jock

Can't be asking us, we ask you these questions

So what's the diff?

I realize that I would be the person to answer the question, but we are not provided with answers as to part number changes or revisions. This is like the 4th or 5th LS spark plug change now. It is also hard to tell any changes since it is just a spark plug.

Aug 16, 2009 | 12:27 PM

#13

Jet-Jock

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From: Lake Mary Florida

Quote:

Originally Posted by Gene Culley

Just giving ya the business... LOL Which is the correct number to use for AC Delco Iridium plugs or is it better to just call you at time of order and specify which year model we have?

Aug 19, 2009 | 09:33 PM

#14

Gene Culley

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From: Reading PA

Quote:

Originally Posted by Jet-Jock

Just giving ya the business... LOL Which is the correct number to use for AC Delco Iridium plugs or is it better to just call you at time of order and specify which year model we have?

I may have worded that incorrectly. GM keeps changing the part number but the same number is used for all of the LS series of engines basically. Anyone can feel free to call... but here is the latest number from my specials list.

12621258 – GM AC Delco Iridium spark plugs – 6.47 each

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