ReviewsMetal Fitting Ceramic Insulator

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.

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.

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior.
The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.
Longer insulator nose, the corrugated ribs on insulator, and a triple gasket seal eliminates combustion gas leakage.
Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines.
Trivalent metal plating has superior anti-seizing properties.

You can depend on NGK for quality and reliability.
Features corrugated ribs, ceramic insulator, copper core and triple interior seal.

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.

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.
The 0.6mm laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect.
Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage.
Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high-performance engines.
Trivalent metal plating has superior anti-corrosion and anti-seizing properties.

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.

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling.
The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes....
Longer insulator nose prevents fouling, the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas....
Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines.
Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties.

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.

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.

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.