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Searching for your parts in the DENSO part catalog is easy. Simply select the type of part you are looking for along with the year/make/model of your U.S. or Canadian vehicle. For vehicles in Latin America, please go here.

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        Search for cross reference part numbers for other manufacturers of the parts you're looking for.

        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.

        1. Terminal-Attachment Specifications
          The plug includes an attachable terminal, which is compatible with almost all plug wires throughout the world. This terminal nut can also be removed for vehicles, which do not require an attachable terminal. (Plug types with fixed terminal are also available.)
          Crimped specifications: IRE01, IW01 Fixed specifications: IWM01, IK01, IK02, IQ01, IQ02, IA01
        2. Built-in High-Reliability Resistor
          Iridium Racing plug specifications match all types of resistors. They also have a built-in monolithic resistor body for greater reliability. They reduce electrical interference in all types of electronic equipment.
        3. Anti-Corrosive Glossy Nickel Plating
          The housing has glossy nickel plating to provide a high level of corrosion resistance. In addition, this eliminates thread seizing, which can occur with zinc-plated plugs, and prevents any damage to the cylinder head plug socket.

        Racing Plugs Individually Packaged in Plastic Cases
        DENSO is the first spark plug manufacturer to package each plug individually in its own protective plastic case. The packaging securely protects the plug body and electrode and makes for trouble-free transportation to the track. In addition, each four–pack contains an Iridium Racing decal.

        Number
        Stock No.
        Thread Diameter
        (mm)
        Thread Reach
        (mm)
        Hex Size
        (in)
        Gap
        (mm)
        Insulator Projection (mm)
        IA01-31#4
        5723
        14
        22
        5/8
        0.6
        -1.0
        IA01-32#4
        5724
        14
        22
        5/8
        0.6
        -1.0
        IA01-34#4
        5725
        14
        22
        5/8
        0.6
        -1.0
        IAE01-32#4
        5747
        14
        19
        5/8
        0.6
        -1.3
        IAE01-34#4
        5748
        14
        19
        5/8
        0.6
        -1.3
        IK01-24#4
        5701
        14
        19
        5/8
        0.7
        -1.0
        IK01-27#4
        5702
        14
        19
        5/8
        0.7
        -1.0
        IK01-31#4
        5703
        14
        19
        5/8
        0.7
        -1.0
        IK02-24#4
        5704
        14
        19
        5/8
        0.7
        -2.3
        IK02-27#4
        5705
        14
        19
        5/8
        0.7
        -2.3
        IK01-34#4
        5706
        14
        19
        5/8
        0.7
        -2.3
        IK02-31#4
        5742
        14
        19
        5/8
        0.7
        -1.0
        IKH01-24#4
        5749
        14
        26.5
        5/8
        0.7
        -1.0
        IKH01-27#4
        5750
        14
        26.5
        5/8
        0.7
        -1.0
        IKH01-31#4
        5751
        14
        26.5
        5/8
        0.7
        -1.0
        IQ01-24#4
        5707
        14
        19
        5/8
        0.7
        -1.0
        IQ01-27#4
        5708
        14
        19
        5/8
        0.7
        -1.0
        IQ01-31#4
        5709
        14
        19
        5/8
        0.7
        -1.0
        IQ01-34#4
        5743
        14
        19
        5/8
        0.7
        -1.0
        IQ02-24#4
        5710
        14
        19
        5/8
        0.7
        -2.3
        IQ02-27#4
        5711
        14
        19
        5/8
        0.7
        -2.3
        IQ02-31#4
        5712
        14
        19
        5/8
        0.7
        -2.3
        IRE01-27#4
        5719
        14
        21.5
        13/16
        0.7
        -2.2
        IRE01-31#4
        5720
        14
        21.5
        13/16
        0.7
        -2.2
        IRE01-32#4
        5721
        14
        21.5
        13/16
        0.7
        -2.2
        IRE01-34#4
        5722
        14
        21.5
        13/16
        0.7
        -2.2
        IRE01-35#4
        5741
        14
        21.5
        13/16
        0.7
        -2.2
        IRT01-31#4
        5752
        14
        19
        13/16
        1.1
        -2.5
        IRL01-31#4
        5755
        57
        21
        13/16
        1.1
        -2.5
        IRT01-34#4
        5753
        14
        19
        13/16
        1.1
        -2.5
        IRL01-27#4
        5754
        14
        21
        13/16
        1.1
        -2.5
        IU01-24#4
        5734
        10
        19
        5/8
        0.6
        -1.8
        IU01-27#4
        5735
        10
        19
        5/8
        0.6
        -1.8
        IU01-31#4
        5736
        10
        19
        5/8
        0.6
        -1.8
        IU01-34#4
        5737
        10
        19
        5/8
        0.6
        -1.8
        IW01-24#4
        5713
        14
        19
        13/16
        0.6
        -1.5
        IW01-27#4
        5714
        14
        19
        13/16
        0.6
        -1.5
        IW01-29#4
        5715
        14
        19
        13/16
        0.6
        -1.5
        IW01-31#4
        5716
        14
        19
        13/16
        0.6
        -1.5
        IW01-32#4
        5717
        14
        19
        13/16
        0.6
        -1.5
        IW01-34#4
        5718
        14
        19
        13/16
        0.6
        -1.5
        IW06-27#4
        5744
        14
        19
        13/16
        0.6
        -1.5
        IW06-31#4
        5745
        14
        19
        13/16
        0.6
        -1.5
        IW06-34#4
        5746
        14
        19
        13/16
        0.6
        -1.5
        IWM01-29#4
        5726
        14
        19
        13/16
        0.6
        -1.5
        IWM01-31#4
        5727
        14
        19
        13/16
        0.6
        -1.5
        IWM01-32#4
        5728
        14
        19
        13/16
        0.6
        -1.5
        IWM01-34#4
        5729
        14
        19
        13/16
        0.6
        -1.5
        IXU01-24#4
        5730
        12
        19
        5/8
        0.6
        -1.5
        IXU01-27#4
        5731
        12
        19
        5/8
        0.6
        -1.5
        IXU01-31#4
        5732
        12
        19
        5/8
        0.6
        -1.5
        IXU01-34#4
        5733
        12
        19
        5/8
        0.6
        -1.5
        RU01-27#4
        5738
        10
        19
        5/8
        1.1
        -0.3
        RU01-31#4
        5739
        10
        19
        5/8
        1.1
        -0.3
        RU01-34#4
        5740
        10
        19
        5/8
        1.1
        -0.3