NGK BR6EF Spark Plug – Stock No. 3177
The NGK BR6EF is a reliable, resistor-type spark plug for everyday driving and mild performance use. It delivers a clean, consistent spark to help cold starts, smooth idle, and efficient combustion. The copper core improves heat transfer, and the NGK ceramic insulator helps resist fouling under varied driving conditions.
Use this plug when your engine calls for a 14 mm thread and 19 mm reach plug with a medium heat range. Always set the electrode gap to your vehicle’s specification.
| Part number | BR6EF |
| NGK stock number | 3177 |
| GTIN | 087295131770 |
| Category | 686 – Spark Plug |
| Thread diameter | 14 mm |
| Thread reach | 19 mm (3/4 in) |
| Seat type | Gasket |
| Hex size | 20.8 mm (13/16 in) |
| Heat range | 6 (NGK scale – medium) |
| Resistor | Yes (reduces electrical interference) |
| Centre electrode | Copper core with nickel alloy tip |
| Ground electrode | Single |
| Recommended tightening torque | 18 – 25 Nm (with gasket, new plug) |
| Gap setting | Set to vehicle specification |
- Improves ignition reliability and throttle response compared to tired or fouled plugs.
- Resistor design helps protect sensitive electronics and reduces radio noise.
- Built to OE standards for consistent performance and long service life.
Check fitment before purchase. Use the site’s vehicle lookup or see the Vehicle Fitment tab to confirm this plug is correct for your engine.
The price displayed is for a single plug, please add the desired amount to your basket.


