NGK CR8EK Standard Resistor Spark Plug – 10mm Multi-Ground Twin Electrode for Suzuki, Yamaha, KTM & Triumph – NGK 3478
NGK CR8EK Standard Resistor Spark Plug – 10mm Multi-Ground Twin Electrode for Suzuki, Yamaha, KTM & Triumph – NGK 3478 is backordered and will ship as soon as it is back in stock.
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NGK CR8EK Standard Resistor Spark Plug – 10mm Multi-Ground Twin Ele...
Ensure reliable ignition and extended service life in your motorcycle, ATV, or UTV with the NGK CR8EK multi-ground spark plug. Features a 98% pure copper core for superior heat dissipation, dual ground electrodes to distribute wear and extend plug life, and a 5K Ohm resistor for EMI suppression .
Precision 10mm x 1.0mm thread, 19mm (3/4") reach, 16mm (5/8") hex, and 0.7mm (0.028") pre-set gap. Threaded stud terminal. Direct OEM replacement for thousands of applications .
Vehicle Fitment:
Always verify fitment using your vehicle's specific model, year, and engine code before ordering.
Product Specifications:
OEM & Aftermarket Cross-References:
Why Choose NGK CR8EK?
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Dual ground electrodes – Distributes spark wear to extend service life up to 2x longer than standard single-electrode plugs
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98% pure copper core – Superior heat dissipation for reliable starts and reduced overheating risk
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5K Ohm resistor – Suppresses EMI/RFI interference for ECUs, communication, and audio systems
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Cold-rolled threads – Prevents cross-threading and costly cylinder head damage
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Trivalent metal plating – Corrosion resistant; no anti-seize required
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High-grade alumina silicate ceramic – Stronger insulator for optimal dielectric performance
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Triple-gasket sealing – Virtually eliminates combustion gas leakage
Customer-Verified Performance:
"Fitted to a 2002 DL1000 V Strom. They don't last as long as iridium plugs, but the twin electrode plug certainly works better and is the OEM type."
"Does what it says on the tin (box). Great seller with great service and quick delivery."
⚠️ Important Note: The CR8EK features a threaded stud terminal. The terminal nut is removable for different plug cap styles. Does not include terminal nut per Summit Racing specifications .
Torque Specification: 12–12.7 ft-lb (17.2 Nm) for 10mm gasket-seat plugs.
Trust the original. Trust NGK.
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