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

On SALE! 41-101  -  Iridium Spark Plug For 8.1L & 7.4L


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

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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 .  ( Support )
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. ( Support )
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. ( Support )
Will a ac delco 41-101 work in my 8.1 vortec workhorse w22 ( Roy McBride, 11/02/2017 )
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This product allows for a VIN verification service.

  • VIN part verificaion is a service that we provide free of charge when a part is purchased.
  • When you provide your VIN below we will personally verify your part selection by your VIN before shipment of your order.
  • This helps ensure that this is the correct part for your vehicle.
  • This is not an automatic VIN check, it is done by a parts specialist once order is placed.
  • We can only VIN verify vehicles back to model year 1996, if older we can help but can't guarantee fitment.
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  • Views: 86280
  • Brand: Workhorse
  • Product Code: 41-101
  • Availability: 96
  • $13.50
  • $10.00

Available Options

This product has a minimum quantity of 8