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Best Alumina Ceramic Insulator

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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NGK 6737 Spark Plug Pack of 1

  • 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 4462 Laser Iridium Spark Plug - IZFR6J, 1 Pack

  • Tapered-cut ground electrode improves ignitability and reduces quenching.
  • 98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating.
  • High-grade alumina silicate ceramic insulator for superior strength and heat transfer.
  • Iridium is six times more durable than platinum.
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Denso (3297) SK20R11 Spark Plugs, Pack of 4

  • Twin-tip technology with 11 mm platinum center electrode and 11 mm titanium enhanced ground electrode.
  • Improve fuel economy, better acceleration and faster starts than all other single platinum plugs.
  • Purified alumina powder insulator provides exceptional dielectric strength and thermal conductivity, allowing the material to stand up to extreme stress.
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Sportster Sport XL 1200S Performance Spark Plugs Pair repl. OEM# 6R12

  • 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 Spark Plug, NGK CR7E, ea, 1

  • 98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating.
  • High-grade alumina silicate ceramic insulator for superior strength and heat transfer.
  • Cold-rolled threads to prevent cross-threading and damage to cylinder heads.
  • Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover.
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NGK Spark Plug BU8H- Set of 4

  • 98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating.
  • High-grade alumina silicate ceramic insulator for superior strength and heat transfer.
  • Cold-rolled threads to prevent cross-threading and damage to cylinder heads.
  • Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover.
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Denso (4507) PQ16TT Platinum TT Spark Plug, (Pack of 1)

  • Twin-tip technology with 11 mm platinum center electrode and 11 mm titanium enhanced ground electrode.
  • Improve fuel economy, better acceleration and faster starts than all other single platinum plugs.
  • Purified alumina powder insulator provides exceptional dielectric strength and thermal conductivity, allowing the material to stand up to extreme stress.
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NGK 4730 Standard Spark Plug - BPR8Z, 1 Pack

  • 98% pure copper core increases heat dissipation for more reliable starts and prevents spark plug from overheating.
  • High-grade alumina silicate ceramic insulator for superior strength and heat transfer.
  • Cold-rolled threads to prevent cross-threading and damage to cylinder heads.
  • Trivalent plating eliminates need for anti-seize and corrugated ribs prevent flashover.
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NGK 5044 Iridium IX Spark Plug - BR8EIX, 1 Pack

  • fine wire center electrodes ensure high durability and consistently stable spark.
  • iridium alloy has an extremely high melting point, perfect for today's high-tech, high-performance engines.
  • pure alumina silicate ceramic insulator provides superior strength and better heat transfer.
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