NGK 4663 CR7EB Standard Copper Core Spark Plug, 10mm, Heat Range 7

The NGK 4663 (CR7EB) Standard Spark Plug is an OE-quality nickel alloy replacement spark plug with a solid copper core. It is built for reliable ignition, consistent starting and dependable everyday performance in motorcycle, scooter, powersports and small engine applications. NGK is a long-time original equipment supplier, and this plug is part of its Standard line, which has been a staple replacement choice for decades.

Key Features:

• Solid copper core improves heat dissipation and conductivity
• High-grade alumina silicate ceramic insulator for strength, dielectric performance and heat transfer
• Triple gasket sealing helps prevent combustion gas leakage
• Corrugated insulator ribs help prevent flashover
• Trivalent metal plating resists corrosion and seizing
• Built-in 5k ohm resistor helps suppress radio-frequency interference
• Nickel center and ground electrodes, standard non-projected design

Specifications:

• NGK part number: 4663 (CR7EB)
• Heat range: 7
• Thread size: 10mm, 1.0mm pitch (M10-1.0)
• Reach: 19mm (3/4")
• Hex size: 5/8" (16mm)
• Seat type: Gasket (crush washer included)
• Terminal type: Solid, non-removable nut
• Resistor: Yes, 5k ohm
• Gap: .031" (0.8mm)
• Ground electrode: Single, J-gap, nickel
• Insulator material: Ceramic
• Torque: 7.2-10.8 lb-ft (cast iron head), 7.2-8.7 lb-ft (aluminum head)

The NGK 4663 CR7EB is a dependable, OE-grade spark plug for routine maintenance and tune-ups. Check the gap before installation and tighten to the specified torque.