Name: 41-101 - Iridium Spark Plug For 8.1L & 7.4L
Brand: Workhorse
SKU: 41-101
Price: 10.00 USD
Availability: InStock

41-101 - Iridium Spark Plug For 8.1L & 7.4L

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41-101 - Iridium Spark Plug For 8.1L & 7.4L

: 41-101

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41-101 - Iridium Spark Plug For 8.1L & 7.4L

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WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

2001 GMC 3500 pick up truck. I'm looking to purchase your spark plug wires and plugs. The wires seem of top quality, so the price probably reflects that! However---

Your spark plugs 41-101 picture show they are NOT OEM Delco's...why would I spend 80$ for 8 plugs when I can get those non-delco's for 22$ for 8plugs?

Also...in the question area.....out of one breath U say leave gap of 60...but then in other question you say gap at 45...what gap is it?

Thank You for helping me understand, I'm sorry if my questions seem blunt and to the point, but feel it's important to know what we are getting per the dollar! ( doug rock, 02/27/2025 )

Hello Doug , our spark plugs are the AC-Delco 41-101's . We no longer recommend tightening the gap as it doesn't really make a difference with our wires and the iridium is easy to damage when closing the gap . They come pre-gapped to 0.060 , not a bad idea to verify though( carefully) .

I'm unsure what to do about the GAP on the 41-101. I'm installing the kit on my vortec 8.1, it seems like you recommending I gap the plugs to .045? Is that right? I want the best performance, of course. ( Harold Tomlinson, 03/01/2023 )

Hello Harold, the Iridium spark plugs (41-101) should come pre-gapped to 0.060 , and are not recommended to be "gapped" any tighter .

My GM 8.1L Vortec is from 2002. Are these plugs generic for all years of the GM 8.1L? ( Jeffery Howland, 12/28/2020 )

Yes, we use this part # in all year models of the 8.1L.

Have a 8100 vortec with banks headers, cai, exhaust. Are the 41-101 plugs right for this? ( Kenneth Ruedinger, 07/31/2018 )

Yes those are the correct spark plugs for your application. They come pre-gapped at .060 but a lot of people have seen an improvement by reducing the gap to .045.

Will a ac delco 41-101 work in my 8.1 vortec workhorse w22 ( Roy McBride, 11/02/2017 )

Not answered yet.