NGK DCPR9E Spark Plug (Stock No. 2641)
The NGK DCPR9E is a cold-range, resistor spark plug built for consistent ignition under sustained high temperatures. It uses a projected tip for stable flame growth and a copper core to pull heat away from the tip quickly. This helps reduce knock risk and fouling in hard-use conditions. It is a direct, reliable choice where a DCPR9E is specified.
- Cold heat range (9) for better control in high-load or high-rev use
- Resistor design to reduce electrical noise that can affect the ECU
- Projected tip for a clean, stable spark
- Durable nickel alloy electrodes with a copper core for good heat dissipation
| Part number | DCPR9E |
| NGK stock number | 2641 |
| Category | 686 – Spark Plug |
| GTIN | 087295126417 |
| Thread diameter | 12 mm |
| Thread reach | 19 mm |
| Seat type | Flat seat with gasket |
| Hex size | 16 mm |
| Heat range | 9 (cold) |
| Resistor | Yes (approx. 5 k?) |
| Electrode material | Nickel alloy centre and ground, copper core |
| Tip style | Projected insulator |
| Factory gap | Approx. 0.8 mm (check and set to vehicle spec) |
| Terminal type | Solid terminal |
| Tightening torque | 10-12 N·m (12 mm thread, gasket seat) |
| Tightening angle (new gasket) | Finger tight, then 1/2 turn |
Fitment guidance
Commonly specified for many modern motorcycles, scooters and small engines that require a 12 mm, 19 mm reach, projected, resistor plug in heat range 9. Use our vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
Important: Always match the heat range and gap to the vehicle manufacturer’s specification. Do not mix heat ranges across cylinders.
The price displayed is for a single plug, please add the desired amount to your basket.


