NGK 4554 Racing Spark Plug

NGK 4554 (R5671A-9) Racing Spark Plug

Unleash the full potential of your high-performance marine engine with the NGK 4554 (R5671A-9) Racing Spark Plug. Engineered for the extreme demands of competitive boating and high-output watercraft, this spark plug is the pinnacle of ignition technology, designed to deliver maximum power, unparalleled reliability, and consistent performance when you need it most. Whether you´re racing across the water or pushing your modified boat to its limits, trust NGK to provide the ultimate spark for your fuel system.

Key Benefits

Maximum Engine Performance: Experience a significant boost in engine efficiency and power output. The NGK 4554 is meticulously designed to create the most powerful and consistent spark, ensuring optimal fuel combustion. This translates to sharper throttle response, quicker acceleration, and a higher top speed, giving you a distinct competitive advantage on the water.

Superior Durability in Harsh Marine Environments: Built to withstand the punishing conditions of high-compression, high-RPM marine racing engines. Its robust construction offers exceptional resistance to the intense heat and pressure, preventing pre-ignition and detonation. The Trivalent Metal Plating provides outstanding anti-corrosion and anti-seizing properties, crucial for longevity in humid and saltwater environments.

Enhanced Ignitability and Fuel Efficiency: The advanced electrode design ensures that every ignition cycle is precise and powerful. This superior ignitability not only maximizes power but also promotes more complete fuel burning, leading to improved fuel economy and reduced fouling, keeping your engine running cleaner and stronger for longer periods.

Main Features

The NGK 4554 Racing Spark Plug is purpose-built with features derived from decades of racing experience and cutting-edge engineering.

Racing plugs feature a center electrode with a V-groove and a thicker ceramic shell for the high-heat applications in racing engines.

Special center electrode designs and configurations to ensure durability and ignitability.

Unique ground electrode designs with different materials based on specific applications.

Race tested and approved.



Furthermore, its superior construction includes a special insulator nose to improve throttle response and prevent fouling, along with pure alumina silicate ceramic for greater strength and better heat transfer. A copper core aids in heat removal, and triple seals prevent combustion gas leakage, ensuring every ounce of power is harnessed effectively.

Spark plugs - Technical specifications

Ensure perfect compatibility and performance with these detailed specifications for the NGK 4554 / R5671A-9.
* Stock Number: 4554
* Part Number: R5671A-9
* Thread Diameter: 14mm
* Thread Reach: 19mm (3/4")
* Hex Size: 16mm (5/8")
* Heat Range: 9
024" (0.6mm)
* Center Electrode: Nickel
* Ground Electrode: Nickel Alloy
* Type: Racing Plug

Choose the NGK 4554 Racing Spark Plug for your boat´s high-performance fuel and ignition system. It´s not just a part; it´s a critical upgrade for any serious boater or marine racer demanding uncompromising quality and championship-proven performance