NGK 4551 Spark Plug BR9HS-10 - 4 Pack

The NGK 4551 Spark Plug (BR9HS-10) is engineered for reliable ignition and performance in high-revving two-stroke engines. Featuring a solid copper core and nickel alloy electrode, it delivers excellent heat dissipation, fouling resistance, and consistent combustion—ideal for motorcycles, ATVs, snowmobiles, and other powersport applications.

Features & Benefits:

🔧 Copper core ensures strong spark and efficient thermal transfer
🔧 Nickel alloy electrode resists corrosion and wear
🔧 Pre-gapped at 1.0mm for accurate, easy installation
🔧 Designed for high-RPM two-stroke engine operation

Specifications:

Brand & Part Number: NGK 4551 (BR9HS-10)
Material: Nickel with Copper Core
Thread Size: 14mm
Reach: 12.7mm (0.5 in)
Hex Size: 13/16 in (20.8mm)
Heat Range: 9
Seat Type: Gasket
Resistor: Yes
Gap: 1.0mm (0.039 in)

Choose NGK BR9HS-10 for dependable starts, strong ignition, and long-lasting performance in your two-stroke engine—order now!