NGK SPARK PLUG CR8EH-9 5666
NGK CR8EH-9 5666 Spark Plug. Copper core for efficient heat dissipation and stable ignition under high temperatures. High conduction copper provides a raised pre-ignition rating. Designed for high-performance engines. Half thread design for specific Honda engines. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator offers superior strength and heat transfer. Copper core and triple seals aid heat removal and prevent leakage. Heat Range: 8. Thread Size: 10mm. Type: Resistor. Reach: 19mm (3/4"). Hex Size: 5/8" (16mm). Seat Type: Gasket. Gap: 0.035" (0.9mm). Thread Type: Half Thread (12.7mm / 1/2" threaded). Terminal Type: Stud Terminal Threads (Terminal Nut not included). Weight: 0.06 lbs. Units Sold: Single. Alternate/OEM Part Numbers: 5666, CR8EH-9.
- SKU
- 37-CR8EH-9
- Brand
- NGK
- Availability
- In Stock (60)
FULL DESCRIPTION
NGK Spark Plug CR8EH-9 (5666)
The NGK CR8EH-9 is a special half-threaded spark plug engineered for optimal performance in various engines. Featuring a robust copper core and a pure alumina silicate ceramic insulator, this spark plug is built for durability and efficient heat dissipation, ensuring stable ignition even under high temperatures.
Key Features:
- Efficient Heat Dissipation: The copper core rapidly dissipates heat, cooling the electrode and insulator tip for improved engine performance.
- High Conduction Copper: Offers a raised pre-ignition rating and a long nose insulator for stable ignition in demanding conditions.
- Designed for High-Performance: Meets the specific requirements of high-performance engines for consistent operation.
- Half Thread Design: Features a half-thread configuration for a precise and secure fit in compatible engines.
- Durable Construction: Corrugated ribs prevent flashover, while the alumina silicate ceramic insulator provides superior strength and enhanced heat transfer.
- Leakage Prevention: Triple seals work in conjunction with the copper core to prevent interior leakage and further aid heat removal.
Specifications:
- Heat Range: 8
- Thread Size: 10mm
- Type: Resistor
- Reach: 19mm (3/4")
- Hex Size: 5/8" (16mm)
- Seat Type: Gasket
- Gap: 0.035" (0.9mm)
- Thread Type: Half Thread (12.7mm / 1/2" threaded)
- Terminal Type: Stud Terminal Threads (Terminal Nut not included)
- Weight: 0.06 lbs
- Units Sold: Single
- Alternate/OEM Part Numbers: 5666, CR8EH-9


