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Best Alumina Insulator

NGK (4626) BPMR7A Standard Spark Plug, Pack of 1

  • Designed to operate over a much wider heat range than ordinary plugs.
  • High alumina ceramics for better heat transfer and electrical insulation.
  • Solid copper core and nickel tipped electrode provide a longer plus life.
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage.
  • Corrugated ribs on insulator prevents flashover.
  • Triple gasket seal eliminates combustion gas leakage.
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NGK (7321) BPM7A Standard Spark Plug, Pack of 1

  • Designed to operate over a much wider heat range than ordinary plugs.
  • High alumina ceramics for better heat transfer and electrical insulation.
  • Solid copper core and nickel tipped electrode provide a longer plus life.
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage.
  • Corrugated ribs on insulator prevents flashover.
  • Triple gasket seal eliminates combustion gas leakage.
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NGK (4838) BP8H-N-10 Standard Spark Plug, Pack of 1

  • Designed to operate over a much wider heat range than ordinary plugs.
  • High alumina ceramics for better heat transfer and electrical insulation.
  • Solid copper core and nickel tipped electrode provide a longer plus life.
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage.
  • Corrugated ribs on insulator prevents flashover.
  • Triple gasket seal eliminates combustion gas leakage.
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NGK (4008) BPR6ES SOLID Standard Spark Plug, Pack of 1

  • Designed to operate over a much wider heat range than ordinary plugs.
  • High alumina ceramics for better heat transfer and electrical insulation.
  • Solid copper core and nickel tipped electrode provide a longer plus life.
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage.
  • Corrugated ribs on insulator prevents flashover.
  • Triple gasket seal eliminates combustion gas leakage.
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NGK 3133 BPZ8HS-10 Standard Spark Plug (Pack of 1)

  • Designed to operate over a much wider heat range than ordinary plugs.
  • High alumina ceramics for better heat transfer and electrical insulation.
  • Solid copper core and nickel tipped electrode provide a longer plus life.
  • Patented triple gasket sealing process eliminates the possibility of combustion gas leakage.
  • Corrugated ribs on insulator prevents flashover.
  • Triple gasket seal eliminates combustion gas leakage.
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6-Pack NGK Spark Plugs TR55 Stock # 3951

  • Trapezoid cut ground electrode reduces quenching.
  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer.
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Performance Spark Plugs Pair for Softail Deuce 1999-2014 Models

  • Conventional style spark plugs, available in OEM heat ranges.
  • Plugs have a unique look with a black ceramic body.
  • Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior insulation.
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Performance Spark Plugs Pair for Softail Deuce 1999-2014 Models

  • Conventional style spark plugs, available in OEM heat ranges.
  • Plugs have a unique look with a black ceramic body.
  • Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior insulation.
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Performance Spark Plugs Pair for Softail Deuce 1999-2014 Models

  • Conventional style spark plugs, available in OEM heat ranges.
  • Plugs have a unique look with a black ceramic body.
  • Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior insulation.
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NGK 6431 Standard Spark Plug - BU8H, 10 Pack

  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer.
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NGK 3271 Spark Plug

  • Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties.
  • Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer.
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NGK 5019 Spark Plug

  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer.
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NGK 6578 Spark Plugs (BPR4ES) - Pack of 2

  • Trivalent metal plating provides superior anti-corrosion and anti-seizing properties.
  • Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer.
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