Racing Resistor Spark Plug 14mm x 25mm Reach
InfoVehicle Info Needed
NGK SPARK PLUGSPART NUMBER: 739-R7448A-9

Racing Resistor Spark Plug 14mm x 25mm Reach

$1801
ShippingShips on 09/15/2026
Lowest PriceLowest Price Guarantee

Medium-Cold Heat Range
Racing Spark Plug
  • Resistor
  • Hex Size: 5/8 (.625) in.
  • Thread Reach: 25 mm
  • Thread Diameter: 14mm
  • Seat: Tapered
  • Heat Range: 9
  • Tip: Nickle Trapezoid
  • Gap: Adjustable Gap preset to 0.030 in.
  • 1/pkg

    NGK R7448A-9 Features:

    • Engineered to handle several drive-cycles & the extreme pressures associated with high horsepower engines
    • Specially designed tip configuration improves throttle response throughout the entire rpm range
    • Corrugated ribs help prevent flashover, a condition that causes the cap seal to melt onto the spark plug insulator
    • Pure alumina silicate ceramic insulator ensures superior strength and heat transfer
    • The copper core allows for better heat removal from the plug
    • Triple seals mean no leakage

    Torque Specs:

    • Cast Iron Cylinder Heads: 10.800 - 18 lb. ft.
    • Aluminum Cylinder Heads: 7.200 - 14.5 lb. ft.

    Stock Number: 96969

  • Part TypeSpark Plug
    BrandNGK SPARK PLUGS
    Package Height0.83
    Package Width0.94
    Package Length3.7
    Weight0.11 PG
    Part CategoryPerformance Parts
    Reach0.98
    Thread Diameter0.55 in (14 mm)
    Ground Electrode Quantity1
    Center Electrode DesignStandard / Regular
    Thread Size14mm X 1.25
    Shorty Spark PlugNo
    Seat TypeTapered
    Center Electrode Tip MaterialNickel
    Insulator MaterialCeramic
    Part FitmentUniversal
    ResistorYes
    Hex Size0.625 in (15.875 mm)
    Vendor Part NumberR7448A-9
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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