NGK B8ECS Spark Plug – NGK Stock No. 2821
The NGK B8ECS is a non-resistor, standard-type spark plug designed for reliable ignition and stable performance. It uses a copper-core centre electrode for better heat control and a nickel alloy tip for long service life. Heat range 8 suits higher temperature use than softer plugs, making it a common choice where a cooler plug is specified.
It is widely used in many classic motorcycles and small engines that call for a 14 mm thread, 19 mm reach, non-resistor plug in NGK heat range 8. Use the site’s vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
| Specification | Value |
|---|---|
| Part Number | B8ECS |
| NGK Stock Number | 2821 |
| GTIN | 087295128213 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Reach | 19 mm |
| Hex Size | 20.8 mm |
| Seat Type | Gasket |
| Heat Range (NGK) | 8 |
| Resistor | No |
| Terminal | Solid type |
| Electrode Material | Nickel alloy with copper core |
| Electrode Design | Standard ground, 2.5 mm centre |
| Factory Gap | 0.7 mm |
| Projection | Non-projected |
| Typical Torque – new plug | 18 – 25 Nm |
- Consistent spark for smoother idle and better throttle response.
- Copper core helps manage heat under hard use.
- Durable nickel tip resists wear for steady performance.
- Non-resistor type suits many older ignition systems.
Important: Check if your vehicle requires a resistor plug. Using a non-resistor plug where a resistor type is specified can cause electrical interference. Always verify heat range, reach, and thread before installation.
The price displayed is for a single plug, please add the desired amount to your basket.


