NGK 4554 (R5671A-8) Racing Spark Plug, Pack Of 4

The NGK 4554 Racing Spark Plug (R5671A-9) is engineered for extreme performance in racing and high-compression engines. With a projected tip design, solid copper core, and cold heat range, it delivers superior ignition, excellent detonation resistance, and consistent spark at high RPM—perfect for drag, circuit, and professional motorsport applications.

Features & Benefits:

🔧 Copper core provides superior thermal conductivity under high loads
🔧 Cold heat range ideal for high-compression, high-RPM engines
🔧 Non-resistor design for maximum spark energy
🔧 Projected tip enhances flame propagation and ignition stability

Specifications:

Brand & Part Number: NGK 4554 (R5671A-9)
Material: Nickel with Copper Core
Thread Size: 14mm
Reach: 19mm (0.75 in)
Hex Size: 5/8 in (16mm)
Heat Range: 9
Seat Type: Gasket
Resistor: No
Gap: 0.7mm (0.028 in)

Choose NGK R5671A-9 for unmatched performance, durability, and spark control in your race engine—trusted by champions worldwide!