# BR8ECMIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: BR8ECMIX**

Iridium NGK spark plugs offer a longer service life than a standard nickel-tipped spark plug: while nickel-alloy plugs offer a service life of roughly 20,000-40,000km, NGK Iridium IX spark plugs offer a service life of up to 60,000km, so fewer replacements are needed over time despite the higher initial cost.

Precious-metal spark plugs like the NGK Iridium IX also offer higher ignitability, achieved with an exposed fine-tip centre electrode that promotes superior flame growth compared with a standard spark plug. Iridium has a much higher melting point (2410°C) than nickel (1453°C), allowing the centre electrode diameter to be reduced from 2.5mm to 0.6mm – a smaller electrode mass that reduces the impedance to flame progress, helping acceleration, fuel consumption and idle quality.

## ⚙️ Key Features

-   Fine iridium-tipped centre electrode for a slow wear rate and stable idle
-   Longer service life than standard nickel plugs
-   Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
-   Corrugated ribs reduce the risk of flashover
-   Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
-   Copper core aids in heat removal
-   Triple seals prevent leakage

## 📏 Specifications

-   NGK stock number: 3520
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 20.8 mm (13/16 in)
-   Seat: Gasket
-   Terminal: Solid
-   Type: Compact

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment. The gap is not the same on all of them – the chart lists between 0.5 mm and 1.0 mm depending on the engine, so check the line for yours.

-   Kawasaki KX250 (250, 2007) – Motorcycle
-   Kawasaki KX250-R (250, 2006-2005) – Motorcycle
-   Ktm 380 EXC (380, 2002-1998) – Motorcycle
-   Ktm 380 MXC (380, 2001-1998) – Motorcycle
-   Ktm 380 SX (380, 2002-1998) – Motorcycle
-   Ktm 360 MXC (360, 1997) – Motorcycle
-   Ktm 360 SX (360, 1997) – Motorcycle
-   Ktm 300 EXC (300, 2005-1998) – Motorcycle
-   Ktm 300 MXC (300, 2005-1997) – Motorcycle
-   Ktm 250 EXC (250, 2005-1997) – Motorcycle
-   Ktm 250 MXC (250, 2001-1998) – Motorcycle
-   Ktm 250 SX (250, 2016-1997) – Motorcycle
-   Ktm 250 SXS (250, 2006) – Motorcycle
-   Ktm 65 SX (65, 2007-2002) – Motorcycle
-   Ktm 65 XC (65, 2008) – Motorcycle
-   Ktm 50 MINI (50, 2005) – Motorcycle
-   Ktm 50 MINI ADVENTURE (50, 2007-2003) – Motorcycle
-   Ktm 50 SENIOR ADVENTURE (50, 2007-2005) – Motorcycle
-   Ktm 50 SR ADVENTURE (50, 2005-2003) – Motorcycle
-   Ktm 50 SUPERMOTO (50, 2006) – Motorcycle
-   Ktm 50 SX (50, 2007-2006) – Motorcycle
-   Ktm 50 SX MINI (50, 2008) – Motorcycle
-   Ktm 50 SX PRO JR. (50, 2008-2003) – Motorcycle
-   Ktm 50 SX PRO SR. (50, 2007-2003) – Motorcycle

## 🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

-   DENSO: 5391, IWM24

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 58.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 58.00 AUD | In stock |

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/br8ecmix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03