XZR8®
ManufacturerDenso GK3-7 / IR3
Spark Plug TypeLong-life iridium-platinum alloy
Thread SpecificationM14 × 1.25
Thread Length19 mm (3/4\u201d)
Wrench Size5/8” (16 mm)
Center Electrode MaterialPlatinum / 360° Laser Welding
Electrode Count0.7–0.8 mm (factory preset, non-adjustable)
Temperature GradeDenso Heat Value 3 (Cool Type, Equivalent to NGK 7-8 Grade)
Resistance5 kΩ
Applicable FuelCompressed Natural Gas (CNG) / Liquefied Natural Gas (LNG)
Voltage Range30–40 kV
Bundle Included6 Spark Plugs + High-Tension Wire Harness (674-1001) + Insulating Grease (Depending on the Specific Kit)
Recommended Replacement CycleRecommended 50,000–80,000 km or as per engine maintenance manual
Manufacturer No.
GK3-7674-2000105001105002IR3674-1001
OEM Part No.
49558504937472397611954730104989131397935954730095473010
Engine Part No.
ISL GISC GISL8.3GISL8.9GL9NQSL9 GC8.3GC GAS PLUSL GAS PLUSB5.9G6BT5.9GISB5.9GCM556CM2180CM2380CM558
Interchange No.
674-2000GK3-7FF-2006128RH10C21639644084089629
Fitment Vehicles
Cummins ISL G Series Natural Gas EngineCummins ISC G SeriesCummins L9NCummins QSL9 GCummins 6CT Natural Gas VersionCummins 6BT5.9 Natural Gas VersionDongfeng/Komatsu Natural Gas VehicleGenerator SetBusHeavy Duty Truck

Engine System - Industrial Encyclopedia

High-quality aftermarket spark plug kit for Cummins ISL G CNG engines. Compatible with OE numbers 4955850, 4937472, 3976119, 5473010, 4989131, 3979359, 5473009. Includes parts GK3-7, 674-2000, 105001, 105002, IR3, 674-1001. Reliable performance for natural gas powered vehicles.