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Spark Plugs for 05 with 5.3L

Discussion in 'GM Powertrain' started by jason778, Mar 22, 2010.

  1. jason778

    jason778 New Member

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    My manual calls for 41-985 plugs however I have seen some information that 41-110 may be the replacement. Can anyone confirm what the current production AC Delco Spark Plug I need is?

    Thanks!
    #1
  2. 99'HEARTBEAT

    99'HEARTBEAT Moderator

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    G.M ...has changed the part # Number for the A/C Delco Iridium Spark plugs,you are correct with the part number being 41-110....it is the old part number 41-985.

    Here are the ones you are asking about,

    http://www.summitracing.com/parts/ACF-41-985/
    Last edited: Mar 22, 2010
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  3. jason778

    jason778 New Member

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    Thanks for the help! Do you know if there is any real advantage to using the 41-110 over the older 41-985? Thanks!
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  4. 99'HEARTBEAT

    99'HEARTBEAT Moderator

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    No Advantage....It's the same Iridium tip Spark Plug,...just a different part Number...They do come Pre-Gapped out of the box,

    The gap on the Plugs should be 0.40
    Last edited: Aug 1, 2010
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