NGK 4455 CR7EKB Standard Multi-Ground Spark Plug, Nickel, Heat Range 7

The NGK 4455 (CR7EKB) Standard Spark Plug is a resistor-type, multi-ground nickel spark plug built to OE-equivalent specifications. Its two ground electrodes help maintain reliable ignition as the gap wears. This makes it a dependable replacement plug for powersports, motorcycle and other applications that call for the CR7EKB.

Key Features:

• Multi-ground design: two ground electrodes make the plug less sensitive to rising voltage requirements as the gap grows
• Nickel alloy center electrode: provides consistent performance and long service life
• Solid copper core: improves heat dissipation, conductivity and heat range
• Alumina silicate ceramic insulator: gives strength and good heat transfer, with corrugated ribs to reduce flashover
• Triple-seal construction: helps prevent combustion gas leakage
• Trivalent metal plating: resists corrosion and seizing for easier installation and removal
• Resistor type (5k ohm): suppresses radio-frequency interference

Specifications:

• NGK stock number: 4455
• NGK part/service number: CR7EKB
• Heat range: 7
• Thread size: 10 mm, 1.0 mm pitch (M10x1.0)
• Reach: 19 mm (3/4 in)
• Hex size: 5/8 in (16 mm)
• Seat type: gasket (flat seat)
• Terminal: solid, non-removable
• Gap: 0.031 in (0.8 mm)
• Electrode: nickel, projected center electrode, 2 ground electrodes
• Resistance: 5k ohm
• Torque: 7.2-10.8 lb-ft in cast iron heads, 7.2-8.7 lb-ft in aluminum heads
• OEM cross-references: Aprilia 8560146, Citroën/Peugeot 759874, Piaggio 829981

NGK is a leading OE spark plug supplier. Standard plugs like the 4455 are best suited to applications that originally used nickel alloy plugs. They are not recommended where the factory plugs were precious metal. Check the gap before installation and tighten to the specified torque.