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  1. 05-18-2008, 09:54 AM #1
    Cachels1
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    Light Metallic Pewter
    2001 Camaro Z28

    NGK Iridium Gap Issue

    Regarding the gap for NGK Iridium's (p/n 7164) I just bought them and they are all gapped at 57. I've read other posts that said the gap s/b 60; another said the Iridiums are pregapped at 55.

    Should I regap them to 55 or 60, or should I just leave them alone?

    My engine is stock no headers and such, my mods are only an SLP MAF, SLP
    lid and a Magnaflow catback.
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  2. 05-18-2008, 10:35 AM #2
    sic2001
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    navy blue metallic
    2001 trans am

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    I just got a set of Denso Iridiums and have the same question. I was always told that all iridiums are pre-gapped.
    GMPP LS6 crate motor,racetronix,Wilwood 6 piston,HID's,200mph speedo,full dynomat, GY F1's,17" Y2K, Alpine audio upgrade,3" ele cutout, LT's, catted-Y, full suspension
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  3. 05-18-2008, 10:38 AM #3
    INMY01TA
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    Black
    2001 Trans Am (sold)

    Anywhere from 55-60 should be fine.
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  4. 05-18-2008, 06:07 PM #4
    SteveC
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    SOM
    2001 Z28 (Sara)

    They should be gapped @ .055 in a NA engine.

    SteveC
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  5. 05-18-2008, 08:05 PM #5
    sic2001
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    navy blue metallic
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    I have 2 sides to my plug gapper, inches and millimeter, mine says .55 ,is this the same as .055?
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  6. 05-19-2008, 03:56 AM #6
    SteveC
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    SOM
    2001 Z28 (Sara)

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    Quote Originally Posted by sic2001 View Post
    I have 2 sides to my plug gapper, inches and millimeter, mine says .55 ,is this the same as .055?

    I read .55 as being a 1/2 " gap.

    SteveC
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  7. 05-19-2008, 03:49 PM #7
    Black 99 Bird
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    1999 Trans Am

    You should be fine with 57.
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  8. 05-20-2008, 03:47 PM #8
    TedsB4Csled
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    Be very careful if you gap them not to snap electrode.
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