Top Alumina Insulator Reviews

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.