
Cummins 4955850 Spark Plug Kit for ISL G CNG
| Manufacturer | Denso GK3-7 / IR3 |
| Spark Plug Type | Long-life iridium-platinum alloy |
| Thread Specification | M14 × 1.25 |
| Thread Length | 19 mm (3/4\u201d) |
| Wrench Size | 5/8” (16 mm) |
| Center Electrode Material | Platinum / 360° Laser Welding |
| Electrode Count | 0.7–0.8 mm (factory preset, non-adjustable) |
| Temperature Grade | Denso Heat Value 3 (Cool Type, Equivalent to NGK 7-8 Grade) |
| Resistance | 5 kΩ |
| Applicable Fuel | Compressed Natural Gas (CNG) / Liquefied Natural Gas (LNG) |
| Voltage Range | 30–40 kV |
| Bundle Included | 6 Spark Plugs + High-Tension Wire Harness (674-1001) + Insulating Grease (Depending on the Specific Kit) |
| Recommended Replacement Cycle | Recommended 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.
