NGK PFR6B-11C Laser Platinum Spark Plug (Stock No. 2684)
This NGK Laser Platinum plug gives reliable ignition and long service life. It uses a fine-wire platinum centre electrode and a platinum pad on the ground strap. This keeps the spark strong while resisting wear.
It is a good choice for daily use, light tuning, and consistent cold starts. It helps maintain smooth idle and steady fuel economy when the engine and ECU are in good health.
- Strong, clean spark under load for stable combustion
- Long-life precious metal construction resists gap growth
- Preset gap for easy installation
Technical specifications
| Part number | PFR6B-11C |
| NGK stock number | 2684 |
| GTIN | 087295126844 |
| Category | 686 – Spark Plug |
| Type | Laser Platinum (platinum centre + platinum ground pad) |
| Resistor | Yes |
| Heat range | 6 (NGK scale – medium) |
| Thread diameter | 14 mm |
| Thread reach | 19 mm |
| Hex size | 16 mm |
| Seat type | Gasket |
| Gap | 1.1 mm (preset) |
| Electrode design | Fine-wire platinum centre, platinum ground pad |
Fitment guidance
Use the vehicle lookup on our site or check the Vehicle Fitment tab to confirm this plug suits your engine and heat range requirements. Adjust heat range only when you have a clear reason, such as sustained high-load track use.
The price displayed is for a single plug, please add the desired amount to your basket.



