Another Spark Plug Question
Thread Starter
Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 330
From: Charlotte NC
St. Jude Donor '14-'15
Another Spark Plug Question
I have to tell you that it is impossible to find all the specs I'm looking for on AC Delco spark plugs.
My builder installed NGK TR55 plugs because he said of the increase in HP it needs a slightly cooler plug, makes sense to me. I asked him if i could use the stock AC Delco 41-162 Iridium plug, he said yes but the cooler plug would be better. He suggested the NGKTR55ix. I would really like to stick with AC Delco and was looking at the 41-104, it has a heat range of 20. I cannot for the life of me find the heat range on the 41-162.
Does anybody know the heat range on this plug? or are the 41-104 the equal in heat range to the NGK TR55ix?
I do not have any desire to replace plugs every 3000 miles. Thank you to any with insight willing to share.
My builder installed NGK TR55 plugs because he said of the increase in HP it needs a slightly cooler plug, makes sense to me. I asked him if i could use the stock AC Delco 41-162 Iridium plug, he said yes but the cooler plug would be better. He suggested the NGKTR55ix. I would really like to stick with AC Delco and was looking at the 41-104, it has a heat range of 20. I cannot for the life of me find the heat range on the 41-162.
Does anybody know the heat range on this plug? or are the 41-104 the equal in heat range to the NGK TR55ix?
I do not have any desire to replace plugs every 3000 miles. Thank you to any with insight willing to share.
Melting Slicks
Joined: Oct 2010
Posts: 3,037
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From: Tollesboro Kentucky
I don't know if this helps but after a cam and headers install my tuner recommended TR6 plugs for my setup.After some issues with the TCM we found that the computer did not like those.The 41-104 was the same range as the TR6 so that is what we installed and it has been great since.Better to run a slightly colder plug than needed than to run one too hot.If it is any assurance,my tuner and installer also works for BTR Racing.
Melting Slicks
Joined: Jul 2005
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From: Mt. Pleasant S.C.
Burning Brakes
Joined: Dec 2018
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From: Ivanho,Illinois
2025 C6 of the Year Finalist - Modified
I don't know if this helps but after a cam and headers install my tuner recommended TR6 plugs for my setup.After some issues with the TCM we found that the computer did not like those.The 41-104 was the same range as the TR6 so that is what we installed and it has been great since.Better to run a slightly colder plug than needed than to run one too hot.If it is any assurance,my tuner and installer also works for BTR Racing.
Thread Starter
Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 330
From: Charlotte NC
St. Jude Donor '14-'15
OP, I apologize for changing the subject of your thread but for some reason my car too have issues when using NGK TR6 plugs. I run an A&A V3Si Trim on my 2013 GS and it recommended NGK TR6 plugs. But the computer would throw 0300 code and battery voltage issue every time. I swapped to AC Delco 41-104 and solved the issues completely. This is the same plugs they use on the C6 ZR1.
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Supporting Vendor
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2024 C6 of the Year Finalist - Modified
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Stick with stock - they work perfectly well on my 9 second drag car.
Heel & Toe
Joined: May 2021
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If you buy ACDELCO spark plugs, make sure you check out their rebate website and see if the ones you purchased qualify for the rebate. It's $3.00 per iridium plug.
The 41-104, 41-162, and 41-110 all qualify.
The 41-104, 41-162, and 41-110 all qualify.
Last edited by Trusty Ton; Jun 1, 2021 at 05:01 PM.
Thread Starter
Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 330
From: Charlotte NC
St. Jude Donor '14-'15
Yes I bought a set of 41-162 yesterday at Advance I can still use these in my Camaro z28. Advance says that you can only buy 16 BUT......it has to be at 1 purchase. I filed for that one however ac delco itself is running the same rebate did not see any limiter on their site.
Thread Starter
Le Mans Master
Joined: Jun 2011
Posts: 8,049
Likes: 330
From: Charlotte NC
St. Jude Donor '14-'15
