NGK BR8ET Nickel Spark Plug (4221)
Original price was: £11.29.£7.54Current price is: £7.54.
NGK BR8ET Spark Plug – Triple Ground Electrode, 14 mm, Resistor
The NGK BR8ET is a cold heat range, triple-ground electrode spark plug designed for stable ignition under high load and high temperature. The three ground electrodes spread wear and help maintain a consistent spark for longer, which is useful in hard-driven engines and many two-stroke applications. The built-in resistor reduces electrical noise that can affect sensitive electronics.
Expect reliable starting, smoother idle, and steady performance. This plug is a good choice where the manufacturer specifies a BR8ET or an equivalent cold 14 mm long-reach plug.
| Part number | BR8ET |
|---|---|
| NGK stock number | 4221 |
| GTIN | 087295142219 |
| Category | 686 – Spark Plug |
| Thread diameter | 14 mm |
| Thread pitch | 1.25 |
| Reach (thread length) | 19 mm |
| Hex size | 20.8 mm (13/16 in) |
| Seat type | Flat seat with gasket |
| Heat range | 8 (cold) |
| Resistor | Yes |
| Electrode configuration | 1 centre + 3 ground electrodes |
| Centre electrode | Copper core, nickel alloy |
| Ground electrodes | Nickel alloy (triple) |
| Tip projection | Non-projected |
| Factory gap | 0.8 mm (check and adjust to spec) |
Where it typically fits
Commonly specified for many two-stroke motorcycles, scooters, and marine engines, and some performance automotive engines that require a cold 14 mm, long-reach, resistor plug with multi-ground electrodes. Use our vehicle lookup to confirm, or check the Vehicle Fitment tab.
- Set the gap to the vehicle’s spec. Do not force the ground electrodes.
- Do not use anti-seize on the threads. NGK plugs are plated for correct torque.
- Tighten to the manufacturer’s torque spec. For 14 mm gasket-seat plugs, typical torque is 18-25 Nm if no spec is given.
The price displayed is for a single plug, please add the desired amount to your basket.
| Weight | 0.05 kg |
|---|---|
| Dimensions | 10 × 3 × 3 cm |
| Brand |
NGK-4221 Confirmed Fitment
Please note, this information is a combination of supplier provided compatibility data and our workshop expertise. While every effort has been made to ensure the accuracy of this information Progressive Parts Ltd are not liable for abnormalities or inaccurate data. Customers are wholly responsible for checking fitment for their vehicle. More information is available from our Terms & Conditions
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DELIVERY INFORMATION
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