Plugs and wires

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Dec 2, 2020 | 11:50 PM

~~2003_Coupe~~

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Plugs and wires

Hi all. I'm doing some routine maintenance on my car and it seems that most of my searches are turning up obsolete/discontinued part numbers. What are the current plug and coil wire numbers? So far I've got:
plugs: ACdelco 41-985
wires: GM 12495519 (Red)
thanks

Dec 3, 2020 | 08:13 AM

leadfoot4

Team Owner

Joined: May 2001

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From: Western NY

The easiest way to do it, is to contact CF sponsor Gene Culley, at his business, 'Cultrag Performance'. He'll fix you right up............

Dec 3, 2020 | 10:54 AM

knewblewkorvette

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From: Iowa

St. Jude Donor '03 thru '26

Quote:

Originally Posted by leadfoot4

The easiest way to do it, is to contact CF sponsor Gene Culley, at his business, 'Cultrag Performance'. He'll fix you right up............

I used the AC Delco Iridium plugs and the GM red wires. Not cheap but are good for 100K miles.

Dec 3, 2020 | 12:06 PM

~~2003_Coupe~~

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Quote:

Originally Posted by knewblewkorvette

I used the AC Delco Iridium plugs and the GM red wires. Not cheap but are good for 100K miles.

These are the parts I want but I'm having trouble finding the current part numbers to order them. GM has changed the part numbers.

Dec 3, 2020 | 01:18 PM

Ed Ramberger

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From: Denver, NC

The OE AcDelco Iridium 41-110 plugs have been superseded to 41-162.

Everyone will tell you GM Red 12495519 or the MSD 32819 wires. I used the MSD 32819 and they fit and perform perfect.

I originally ordered a set of GM red wires from Cultrag and received a used set of truck wires in the box. Sent them back and ordered the MSD from Advance.

Anymore, I usually use a 20 or 25% off at Advance Auto - order online and pick up in store or free ship. Hard to beat that.

Last edited by Ed Ramberger; Dec 3, 2020 at 01:28 PM.

Dec 3, 2020 | 03:43 PM

~~2003_Coupe~~

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Thank you

Dec 3, 2020 | 03:56 PM

grinder11

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Quote:

Originally Posted by Ed Ramberger

on both. I've had my MSD wires since 2004, still running fine, with no 7,000PM rpm misses, yet! I also have had the "Kool Sox" sleeves on them from the get go. I'm going to try some GM red wires next, as the engine I have came with them. They're 6 years old, and only used for the original dyno tune. Been stored in a drawer ever since. I want to take the car to the strip, make a run with the MSDs, then with the GM wires. You would think 16 year old wires would have some degree of deterioration. But-If the trap speed is pretty much equal, I'll have my answer. OP, I'd price the MSDs, and the GM wires. Whichever has the best deal, that's what I'd go with.

Last edited by grinder11; Dec 3, 2020 at 03:57 PM. Reason: Spelling

Dec 4, 2020 | 11:00 AM

bjones7131

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From: Walhalla South Carolina

I went with what NAPA recommended and they were acdelco plugs and best wires they had, not red in color which is what I wanted.

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Dec 4, 2020 | 05:02 PM

Bill Curlee

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From: Anthony TX

CI 6,7,8,9,11 Vet

St. Jude Donor '08

The GM AC Delco Red wires are a great bang for the buck and the fit and quality are excellent. That's what I use and recommend. I do not like the MSD wires because the boots are a very soft silicone compound and can rip and tear easily. Other than that, they perform as well as any other aftermarket wire.

There is ZERO performance gain to be had between any of the plugs and wires offered OEM or AFTERMARKET. Purchase wires for proper fit and quality materials. The GM Red Wires fit that requirement 100%

Plugs- The only reason that we use the iridium plugs is to extend the life of the plug. If you use an NON iridium plug, you need to change them a LOT more frequently. They will NOT increase the HP over what the OEM plug gave you.

Ed, I'm sorry to hear that you had a bad experience with CUTLTRAG Performance. Ive used Genes service and parts for years and NEVER had any issues. He is a very good source for all current GM Parts. I wonder what the hell happened that you got used wires?

Dec 4, 2020 | 05:36 PM

#10

leadfoot4

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From: Western NY

Quote:

Originally Posted by Bill Curlee

.......Ed, I'm sorry to hear that you had a bad experience with CUTLTRAG Performance. Ive used Genes service and parts for years and NEVER had any issues. He is a very good source for all current GM Parts. I wonder what the hell happened that you got used wires?

I'll take a guess, as I worked in the auto parts business for a while. Someone (less than ethical) comes in and buys a new set of wires. They then go home and install the new wires, and stuff the old wires in the box. Later on, they come back with them, usually waiting for when the store is real busy, and "returns" the wires, claiming he didn't need them after all. Being busy, the clerk simply issues a refund, and puts them back in stock, without checking the contents of the box. They then get resold......

Used to see it a lot with brake calipers.

Dec 5, 2020 | 12:47 AM

#11

~~2003_Coupe~~

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Quote:

Originally Posted by Ed Ramberger

thank you^^ for confirming the plug number change. Can anyone confirm that the red wire part number has been updated? I found these:
https://www.gmpartsdirect.com/oem-pa...e-pkg-19351568

If you search for the old number (12495519) it just seems to lead to fakes made by foreign companies on eBay and Amazon.

Dec 7, 2020 | 07:23 PM

#12

Melting Slicks

Joined: Nov 1999

Posts: 2,343

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From: MI

Cruise-In VI Veteran

Here ya go.
ACDELCO GM ORIGINAL EQUIPMENT Part numbers

Spark Plug Wire Set
Part Number: 9748MM
Product Notes:
Spark Plug Wire Set
All; VIN: G*; VIN: S*
Per Vehicle: 1; Years: 2003-2004

Vehicle List

Spark Plug Wire Set
Part Number: 748CC
Product Notes:
Spark Plug Wire Set
All; BLACK LEADS; VIN: G, Eng Code: LS1*; VIN: S*
Per Vehicle: 1; Years: 1997-2003 Vehicle List
Spark Plug Wire Set
Part Number: 748MM
Product Notes:
Spark Plug Wire Set
All; RED LEADS; VIN: G, Eng Code: LS1*; VIN: S*
Per Vehicle: 1; Years: 2003-2004 Vehicle List ACDELCO GOLD/PROFESSIONAL

ACDELCO GM ORIGINAL EQUIPMENT

Dec 7, 2020 | 08:27 PM

#13

~~2003_Coupe~~

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Quote:

Originally Posted by 69

Here ya go.
ACDELCO GM ORIGINAL EQUIPMENT Part numbers

Spark Plug Wire Set
Part Number: 9748MM
Product Notes:
Spark Plug Wire Set
All; VIN: G*; VIN: S*
Per Vehicle: 1; Years: 2003-2004

Vehicle List

thank you!

Dec 8, 2020 | 10:22 AM

#14

knewblewkorvette

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From: Iowa

St. Jude Donor '03 thru '26

I got mine from a GM parts dealer on eBay. I believe they are a Corvette sponsor too.

https://www.ebay.com/itm/1997-2004-C...53.m1438.l2649

Dec 8, 2020 | 12:17 PM

#15

silver50

Racer

Joined: Aug 2019

Posts: 289

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From: Edinburgh, Scotland

Recently fitted the MSD red wires myself which seem great for the money.

Adding to this to say it really was important to ‘burp” the wires putting them on. You wonder why one isn’t pushing on to the coil but it’s because air is trapped. A small but not too sharp tool inserted into the rubber boot to let air breathe in/out was essential

Dec 8, 2020 | 10:22 PM

#16

Ed Ramberger

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From: Denver, NC

Quote:

Originally Posted by silver50

I would add this footnote. I have never had to pierce one of those boots in my lifetime of working on cars. Piercing the boots is not a great idea because it creates a possible leak path for the spark electricity. Adding dielectric grease inside the boot and firmly pushing them on until they lock is the key.

Last edited by Ed Ramberger; Dec 8, 2020 at 10:25 PM.

Dec 9, 2020 | 02:03 AM

#17

silver50

Racer

Joined: Aug 2019

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From: Edinburgh, Scotland

Not piercing! Slipping something in between the rubber boot and the coil pack to free frapped air while pushing on. I’ve never had to do this before on a car but it was necessary with the MSD wires. Testament to the quality of the wires IMO. The rubber boot totally sealed on the wire itself.

i actually remembered about reading this on the forum when struggling to get the wires fitted on to the coil properly.

Last edited by silver50; Dec 9, 2020 at 02:06 AM.