NGK B8EFS Spark Plug – Stock No. 1049
The NGK B8EFS is a cold-grade, non-resistor spark plug designed for reliable ignition under high load and high temperature. It suits engines that need strong spark performance with better knock resistance, such as tuned or hard-worked motors.
This plug has a 14 mm thread and long 19 mm reach with a gasket seat. It is a standard, non-projected nickel plug for consistent firing and durability.
Note: This is a non-resistor plug. If your vehicle’s ECU or audio system needs resistor plugs, choose an NGK R equivalent.
- Cold heat range for high-load use and reduced risk of pre-ignition
- Standard nickel centre electrode for dependable performance
| Part number | NGK B8EFS |
| NGK stock number | 1049 |
| GTIN | 087295110492 |
| Category | 686 – Spark Plug |
| Thread diameter | 14 mm |
| Thread reach | 19 mm |
| Seat type | Gasket (flat seat) |
| Hex size | 20.8 mm (13/16 in) |
| Heat range (NGK) | 8 (cold) |
| Resistor | No |
| Tip projection | Standard (non-projected) |
| Electrode material | Nickel alloy, single ground |
| Gap | Factory set – check and adjust to your engine spec |
Fitment guidance
Often used where a 14 mm, 19 mm-reach gasket seat plug is specified and a cold heat range is required. Fits many classic performance applications. Use our vehicle lookup to confirm, or check the Vehicle Fitment tab for full details.
The price displayed is for a single plug, please add the desired amount to your basket.


