12mm Thread x 19mm Reach
5/8'' Hex
Projected Tip
Gasket Seat
IXU-Series plugs have a special hardened purified alumina powder insulator for increased strength and thermal conductivity for hard core racing applications.

Denso Iridium Performance IXU22 Spark Plug Heat Range: 22


Iridium Performance IXU22 Spark Plug
  • Heat Range: 22
  • 1.5 Insulator Projection
  • Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Ships Monday
    Lowest Price Guarantee

    12mm Thread x 26.5mm Reach
    9/16'' Hex
    Projected Tip
    Gasket Seat

    Denso Iridium Extra Long Life Spark Plug Heat Range: 20


    Iridium Extra Long Life Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
    Sold Individually
  • $7.99
    $7.49
    ON SALE - $0.50 OFF
    Ships Monday
    Lowest Price Guarantee

    14mm Thread x .460'' Reach
    5/8'' Hex
    Non-Projected Tip
    Tapered Seat
    ITF-Series plugs have a 1.5mm insulator projection for better ignitability in older domestic applications.

    Denso Iridium Performance ITF24 Spark Plug Heat Range: 24


    Iridium Performance ITF24 Spark Plug
  • Heat Range: 24
  • -0.5 Insulator Projection
  • Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Ships Monday
    Lowest Price Guarantee

    14mm Thread x .460'' Reach
    5/8'' Hex
    Projected Tip
    Tapered Seat
    ITF-Series plugs have a 1.5mm insulator projection for better ignitability in older domestic applications.

    Denso Iridium Performance ITF16 Spark Plug Heat Range: 16


    Iridium Performance ITF16 Spark Plug
  • Heat Range: 16
  • 1.5mm Insulator Projection
    Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Ships Monday
    Lowest Price Guarantee

    Denso Iridium Performance ITF20 Spark Plug Heat Range: 20


    Iridium Performance ITF20 Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    14mm Thread x .708'' Reach
    5/8'' Hex
    Projected Tip
    Tapered Seat
    IT-Series plugs have a 1.5mm insulator projection for increased performance, while the -0.5mm projection offers better heat resistance, in newer domestic applications.


    Denso Iridium Performance IT20 Spark Plug Heat Range: 20


    Iridium Performance IT20 Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
    Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    Denso Iridium Performance IT22 Spark Plug Heat Range: 22


    Iridium Performance IT22 Spark Plug
  • Heat Range: 22
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 07/31/17
    Lowest Price Guarantee



    14mm Thread x 1/2'' Reach
    13/16'' Hex
    Tapered Tip
    Gasket Seat

    Denso Iridium Performance IW24 Spark Plug Heat Range: 24


    Iridium Performance IW24 Spark Plug
  • Heat Range: 24
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    14mm Thread x 19mm Reach
    13/16'' Hex
    Projected Tip
    Gasket Seat
    IW-Series plugs have either a porcelain projection of 1.5mm for better ignition or a -0.5mm projection for better heat resistance.

    Denso Iridium Performance IW16 Spark Plug Heat Range: 16


    Iridium Performance IW16 Spark Plug
  • Heat Range: 16
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    Denso Iridium Performance IW20 Spark Plug Heat Range: 20


    Iridium Performance IW20 Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
    Sold Individually
  • $9.99
    $5.89
    ON SALE - $4.10 OFF
    Estimated Ship Date: 08/09/17
    Lowest Price Guarantee

    Denso Iridium Performance IW22 Spark Plug Heat Range: 22


    Iridium Performance IW22 Spark Plug
  • Heat Range: 22
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    Denso Iridium Performance IW24 Spark Plug Heat Range: 24


    Iridium Performance IW24 Spark Plug
  • Heat Range: 24
  • -0.5mm Insulator Projection
    Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Ships Monday
    Lowest Price Guarantee

    Denso Iridium Performance IW27 Spark Plug Heat Range: 27


    Iridium Performance IW27 Spark Plug
  • Heat Range: 27
  • -0.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee


    Denso Iridium Performance IW31 Spark Plug Heat Range: 31


    Iridium Performance IW31 Spark Plug
  • Heat Range: 31
  • -0.5mm Insulator Projection
    Sold Individually
  • $20.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    Denso Iridium Performance IW34 Spark Plug Heat Range: 34


    Iridium Performance IW34 Spark Plug
  • Heat Range: 34
  • -0.5mm Insulator Projection
    Sold Individually
  • $20.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    14mm Thread x 19mm Reach
    16mm Hex
    Projected Tip
    Gasket Seat
    IK-Series plugs 1.5mm projection are perforemance focused, while the -0.5mm projection plugs emphasize heat resistance.




    Denso Iridium Performance IK20 Spark Plug Heat Range: 20


    Iridium Performance IK20 Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
    Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Ships Monday
    Lowest Price Guarantee
    (1)

    Denso Iridium Performance IK20L Spark Plug Heat Range: 20


    Iridium Performance IK20L Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
  • Sold Individually
  • $5.99
    $5.89
    ON SALE - $0.10 OFF
    Ships Monday
    Lowest Price Guarantee





    14mm Thread x 19mm Reach
    16mm Hex
    Projected Tip
    Gasket Seat
    IQ-Series plugs are 1/8'' longer than the IK plugs between the top of the hex and top of the terminal.

    Denso Iridium Performance IQ16 Spark Plug Heat Range: 16


    Iridium Performance IQ16 Spark Plug
  • Heat Range: 16
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee

    Denso Iridium Performance IQ20 Spark Plug Heat Range: 20


    Iridium Performance IQ20 Spark Plug
  • Heat Range: 20
  • 1.5mm Insulator Projection
    Sold Individually
  • $11.99
    Estimated Ship Date: 08/02/17
    Lowest Price Guarantee