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    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