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NGK CR8EIX (4218) Iridium IX Spark Plug
NGK CR8EIX Iridium IX spark plug is designed for consistent ignition performance and extended service life. The fine wire iridium center electrode reduces required firing voltage while maintaining a stable spark across varying operating conditions.
Iridium construction provides high resistance to wear due to its high melting point, making it suitable for modern high-performance engines requiring precise and reliable ignition.
Key Features
Fine wire iridium center electrode reduces required firing voltage
Consistent spark performance across operating conditions
Trivalent metal plating for corrosion and anti-seize resistance
Corrugated ribs help prevent flashover
Alumina silicate ceramic insulator improves strength and heat transfer
Copper core aids in heat dissipation
Triple seals help prevent combustion leakage
Specifications
Thread Diameter: 10mm
Thread Pitch: 1.0mm
Seat Type: Gasket
Reach: 19mm (3/4")
Hex Size: 16mm (5/8")
Terminal Type: Removable Nut
Spark Gap: 0.031" (0.8mm)
Electrode
Center Electrode Material: Iridium
Center Electrode Type: Fine Wire
Center Electrode Size: 0.6mm
Projection: Non-Projected
Ground Electrode Material: Nickel
Ground Electrode Type: Standard
Ground Electrode Shape: Taper Cut
Ground Electrode Quantity: 1
Electrical
Resistor: Yes
Resistance: 5k Ohm
Heat Range: 8
Additional
Brand: NGK / NTK
Longevity: ~50,000 miles (application dependent)
Fitment
Yamaha YZF-R3 2015 - 2026
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NGK CR8EIX Iridium IX Spark Plug

Spark Plugs / NGK

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$14.95

Availability: In Stock

Quantity:

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Brand:

NGK

SKU:

CR8EIX

Description:

NGK CR8EIX (4218) Iridium IX Spark Plug

NGK CR8EIX Iridium IX spark plug is designed for consistent ignition performance and extended service life. The fine wire iridium center electrode reduces required firing voltage while maintaining a stable spark across varying operating conditions.

Iridium construction provides high resistance to wear due to its high melting point, making it suitable for modern high-performance engines requiring precise and reliable ignition.

Key Features

• Fine wire iridium center electrode reduces required firing voltage
• Consistent spark performance across operating conditions
• Trivalent metal plating for corrosion and anti-seize resistance
• Corrugated ribs help prevent flashover
• Alumina silicate ceramic insulator improves strength and heat transfer
• Copper core aids in heat dissipation
• Triple seals help prevent combustion leakage

Specifications

• Thread Diameter: 10mm
• Thread Pitch: 1.0mm
• Seat Type: Gasket
• Reach: 19mm (3/4″)
• Hex Size: 16mm (5/8″)
• Terminal Type: Removable Nut
• Spark Gap: 0.031″ (0.8mm)

Electrode

• Center Electrode Material: Iridium
• Center Electrode Type: Fine Wire
• Center Electrode Size: 0.6mm
• Projection: Non-Projected
• Ground Electrode Material: Nickel
• Ground Electrode Type: Standard
• Ground Electrode Shape: Taper Cut
• Ground Electrode Quantity: 1

Electrical

• Resistor: Yes
• Resistance: 5k Ohm
• Heat Range: 8

Additional

• Brand: NGK / NTK
• Longevity: ~50,000 miles (application dependent)

Fitment

• Yamaha YZF-R3 2015 – 2026

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