NGK B7ECS Spark Plug – Stock No. 2528
The NGK B7ECS is a reliable, cold-range spark plug designed for consistent ignition under demanding conditions. It uses a nickel alloy centre electrode with a copper core for better heat transfer and stable performance. Suitable where a 14 mm thread, 19 mm reach, and heat range 7 plug is specified.
Use our vehicle lookup to confirm fitment, or check the Vehicle Fitment tab for full details.
- Strong, consistent spark for smoother starting and idle
- Cold heat range (7) helps resist pre-ignition in higher load or tuned setups
- Durable design for everyday use and spirited driving
| Part number | B7ECS |
|---|---|
| NGK stock number | 2528 |
| GTIN | 087295125281 |
| Category | 686 – Spark Plug |
| Thread diameter | 14 mm |
| Thread pitch | 1.25 mm |
| Reach (thread length) | 19 mm |
| Hex size | 20.8 mm (13/16 in) |
| Seat type | Flat seat with gasket |
| Heat range | 7 (cold) |
| Resistor | No |
| Projection | Non-projected |
| Centre electrode | Nickel alloy with copper core |
| Ground electrode | Standard single ground |
| Factory gap | 0.7 mm (adjust as specified by the engine manufacturer) |
| Terminal | Solid terminal top |
Important: Always match heat range, reach, seat type, and gap to the engine manufacturer’s specification. Incorrect plug selection can cause misfire or engine damage.
The price displayed is for a single plug, please add the desired amount to your basket.


