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    Cross Reference information is provided as a guide only. Please refer to the "Applications" lookup tabs for more detail. Materials and designs will differ among brands, so plugs are not exactly alike. Always check with your OE service manual for proper installation and settings.

    Iridium Racing® Insulator Height and Configuration

    Identifying Iridium Racing Plug Numbers

    I

    W

    0

    1

    27
    Classification Thread Size Serial Number Electrode Configuration Heating Ranges
    I: Iridium
    R: Surface Gap    		 U: 10mm
    XU: 12mm
    A: 14mm
    AE: 14mm
    K: 14mm
    KH: 14mm
    Q: 14mm
    RE: 14mm
    RL: 14mm
    RT: 14mm
    W: 14mm
    WM: 14mm    		 1: Diagonal ground electrode
    2: Horizontal ground electrode
    6: Diagonal ground electrode, non-resistor plug    		 24
    27
    29
    31
    32
    34
    35

    Iridium Racing Plug Table

    Model (Heating Value)

    Thread Diameter (mm)

    Thread Length (mm)

    HEX (in)

    Plug Height (mm)

    Gasket

    Terminal/ Resistor

    Plug Profile

    Center Electrode Material

    Ground Electrode Material

    Available Heat Ranges
    IU01* 10 19 5/8 50 Yes Removable /Yes 1 A IR PT 24, 27, 31, 34
    RU01* 10 19 5/8 50 Yes Removable/Yes 1 C NI NI 27, 31, 34
    IXU01* 12 19 5/8 51 Yes Removable/Yes 2 A IR PT 24, 27, 31, 34
    IA01* 14 22 5/8 27.6 No Solid/Yes 3 A IR PT 31, 32, 34
    IAE01* 14 19 5/8 27.6 Yes Solid/Yes 4 A IR PT 32, 34
    IK01* 14 19 5/8 50.5 Yes Solid/Yes 5 A IR PT 24, 27, 31, 34
    IK02* 14 19 5/8 50.5 Yes Solid/Yes 5 B IR PT 24, 27, 31
    IKH01* 14 26.5 5/8 50.5 Yes Solid/Yes 6 A IR PT 24, 27, 31
    IQ01* 14 19 5/8 53 Yes Solid/Yes 7 A IR PT 24, 27, 31, 34
    IQ02* 14 19 5/8 53 Yes Solid/Yes 7 B IR PT 24, 27, 31
    IRE01* 14 21.5 13/16 66 Yes Crimped/Yes 8 B IR PT 27, 31, 32, 34, 35
    IRL01* 14 21 13/16 62 Yes Solid/Yes 9 A IR PT 27, 31
    IRT01* 14 19 13/16 62 Yes Solid/Yes 10 A IR PT 31, 34
    IW01* 14 19 13/16 56 Yes Crimped/Yes 11 A IR PT 24, 27, 29, 31, 32, 34
    IW06* 14 19 13/16 56 Yes Solid/Yes 11 A IR PT 27, 31, 34
    IWM01* 14 19 13/16 47.3 Yes Solid/Yes 12 A IR PT 29, 31, 32, 34