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    NGK Iridium IX Spark Plug

    Part # 6509
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    Save $8 after mail-in rebate when you buy 4 or more Autolite Double Platinum Spark Plugs. See rebates page for details.
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    • Product Details

      Part No. 6509

      Warranty Details (1 YR REPLACEMENT IF DEFECTIVE)

      NGK Iridium IX spark plugs are designed specifically for the performance enthusiast. Iridium IX spark plugs offer extreme ignitibility, improved throttle response and superior anti-fouling. The fine-wire iridium center electrode ensures high durability and a consistently stable spark. A special taper-cut ground electrode shape allows more area for faster flame expansion. Iridium alloy has an extremely high melting point, perfect for today's high-performance engines. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.

      Product Features:

      • Fine wire Iridium center electrode ensures high durability and a consistently stable spark
      • Iridium alloy has an extremely high melting point, perfect for today's high-performance engines
      • Trivalent metal plating has superior anti-corrosion and anti-seizing properties
      • Special taper-cut ground electrode shape to allow for more area for flame expansion

    • Specifications
      • Center Electrode Core Material:Copper Core
        Center Electrode Tip Material:Iridium
        Electrode Core Material:Iridium
        Electrode Tip Material:Iridium
        Gap Size:0.044 in
        Ground Configuration:Standard
        Ground Electrode Core Material:Nickel Core
        Ground Electrode Quantity:1
        Ground Electrode Tip Design:Taper Cut
        Ground Strap Quantity:1
        Hex Size:5/8
        Manufacturer Heat Range:6
        Reach:25 mm
        Resistor:Yes
        Seat Type:Tapered
        Shorty Spark Plug:No
        Thread Diameter:14 mm
        Tip Configuration:Solid
        Type:Iridium IX
        Wrench Diameter:5/8 in
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