NGK TR6AP-13 Spark Plug – Stock No. 5809
The NGK TR6AP-13 is a high-quality platinum spark plug designed for reliable ignition and long service life. It delivers consistent spark under daily driving and mild performance use. The factory-set 1.3 mm gap suits many modern petrol engines that specify a wide plug gap for strong combustion.
A platinum centre electrode needs less voltage to spark and wears more slowly than standard copper. This helps cold starts, smooth idle, and stable performance over higher mileages.
Use this plug when your vehicle specifies NGK TR6AP-13 (or an exact cross). For full fitment details, use the site’s vehicle lookup or check the Vehicle Fitment tab.
| Part Number | TR6AP-13 |
|---|---|
| NGK Stock Number | 5809 |
| GTIN | 087295158098 |
| Category | 686 – Spark Plug |
| Thread Diameter | 14 mm |
| Thread Reach | 19 mm (3/4 in) |
| Seat Type | Taper seat |
| Hex Size | 16 mm (5/8 in) |
| Heat Range | 6 (NGK scale – mid heat, good general use) |
| Resistor | Yes |
| Centre Electrode | Platinum fine-wire |
| Ground Electrode | Nickel alloy |
| Projection | Projected tip |
| Factory Gap | 1.3 mm (0.052 in) |
| Terminal | Solid SAE |
| Recommended Torque | 15-20 Nm for 14 mm taper seat (aluminium head) |
- Platinum tip for longer life and stable spark over time.
- Projected nose helps efficient burn and throttle response.
- Resistor design reduces radio interference and protects electronics.
- Wide factory gap supports clean combustion and smooth idle.
Do not change the gap unless the vehicle manufacturer specifies a different setting. Always install into a cool engine and torque correctly to protect the threads and ensure good heat transfer.
The price displayed is for a single plug, please add the desired amount to your basket.


