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NGK Iridium IX Spark Plugs


NGK Spark Plugs
NGK Iridium IX Spark Plugs

Product images may differ from actual product appearance.

The Plug for Serious Enthusiasts
Iridium has a very high melting point that's perfect for high-performance, high-tech engines. It is stronger than any other metal used in spark plugs.

  • Ultra-fine electrode (thin enough for spark consistency & accuracy, thick enough for max durability & longevity)
  • Reduces spark voltage requirement
  • Fuel efficiency & extreme ignitability
  • Improved throttle response
  • Outstanding acceleration
  • Superior antifouling, anticorrosion, and antiseizing properties
  • Quality NGK Spark Plugs
  • Sold individually


  • 34 Products Page: 1 2 ... |  Next Results per Page:
    Extra Hot Heat Range

    739-BKR4EIX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 5/8" Hex
  • ISO projected
  • Gasket seat
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Order Today Ships 05/26/15

    739-TR4IX
    Iridium IX Spark Plug
  • 14mm x .708" Reach
  • 5/8" Hex
  • Projected
  • Tapered seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-XR45IX
    Iridium IX Spark Plug
  • 14mm x 3/8" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • .059" Gap
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Ships
    Hot Heat Range

    739-BCPR5EIX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 5/8" Hex
  • JIS projected
  • Gasket seat
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Ships

    739-BKR5EIX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 5/8" Hex
  • ISO projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-BPR5EIX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-BPR5EIX-11
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • .044" Gap
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-CR5HIX
    Iridium IX Spark Plug
  • 10mm x 1/2" Reach
  • 5/8" Hex
  • Gasket seat
  • Sold Individually
  • $5.39
    Ships

    739-GR5IX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-LTR5IX-11
    Iridium IX Spark Plug
  • 14mm x 25mm Reach
  • 5/8" Hex
  • Projected
  • Tapered seat
  • .044" Gap
  • Sold Individually
  • $9.99
    Ships

    739-LZTR5AIX-13
    Iridium IX Spark Plug
  • 14mm x 25mm Reach
  • 5/8" Hex
  • Extended projection
  • Tapered seat
  • .052" Gap
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-UR55IX
    Iridium IX Spark Plug
  • 14mm x .460" Reach
  • 5/8" Hex
  • Projected
  • Tapered seat
  • .059" Gap
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships
    Hot-Medium Heat Range

    739-BCPR6EIX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 5/8" Hex
  • JIS projected
  • Gasket seat
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Ships

    739-BPR6EIX-11
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • .044" Gap
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-BPR6HIX
    Iridium IX Spark Plug
  • 14mm x 1/2" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Order Today Ships 05/26/15

    739-LFR6AIX-11
    Iridium IX Spark Plug
  • 14mm x 26.5mm Reach
  • 5/8" Hex
  • Projected
  • Gasket seat
  • .044" Gap
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Ships
    Medium Heat Range

    739-BCPR7EIX
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 5/8" Hex
  • JIS projected
  • Gasket seat
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Ships

    739-BCPR7EIX-11
    Iridium IX Spark Plug
  • 14mm x 3/4" Reach
  • 5/8" Hex
  • JIS projected
  • Gasket seat
  • .044" Gap
  • Sold Individually
  • Was: $10.99
    Now: $5.99
    Ships

    739-BPR7HIX
    Iridium IX Spark Plug
  • 14mm x 1/2" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-BR7HIX
    Iridium IX Spark Plug
  • 14mm x 1/2" Reach
  • 13/16" Hex
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-CR7EIX
    Iridium IX Spark Plug
  • 10mm x 3/4" Reach
  • 5/8" Hex
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-DPR7EIX-9
    Iridium IX Spark Plug
  • 12mm x 3/4" Reach
  • 18mm Hex
  • Projected
  • Gasket seat
  • .036" Gap
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-DR7EIX
    Iridium IX Spark Plug
  • 12mm x 3/4" Reach
  • 18mm Hex
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-LFR7AIX
    Iridium IX Spark Plug
  • 14mm x 26.5mm Reach
  • 5/8" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships
    Medium-Cold Heat Range

    739-BPR8HIX
    Iridium IX Spark Plug
  • 14mm x 1/2" Reach
  • 13/16" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-CR8HIX
    Iridium IX Spark Plug
  • 10mm x 1/2" Reach
  • 5/8" Hex
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-DCPR8EIX
    Iridium IX Spark Plug
  • 12mm x 3/4" Reach
  • 5/8" Hex
  • Projected
  • Gasket seat
  • Sold Individually
  • $9.99
    Ships

    739-DR8EIX
    Iridium IX Spark Plug
  • 12mm x 3/4" Reach
  • 18mm Hex
  • Gasket seat
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    739-ER8EHIX
    Iridium IX Spark Plug
  • 8mm x 3/4" Reach
  • 1/2" Hex
  • Gasket seat
  • Sold Individually
  • Was: $18.99
    Now: $7.99
    Ships
    Cold Heat Range

    739-CR9EHIX-9
    Iridium IX Spark Plug
  • 10mm x 3/4" Reach
  • 5/8" Hex (partial thread)
  • Gasket seat
  • .036" Gap
  • Sold Individually
  • Was: $11.99
    Now: $5.99
    Ships

    34 Products Page: 1 2 ... |  Next Results per Page: