# BKR5EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: BKR5EIX**

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: 6341
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Terminal: Solid
-   Type: ISO Projected BK-Series

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment and automotive vehicles. 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.

-   Briggs & Stratton 4-CYCLE OHV AIR COOLED (5 HP) – Outboard Engine
-   Evinrude (115 HP, 2005-2004) – Outboard Engine
-   Evinrude (100 HP, 2005-2004) – Outboard Engine
-   Evinrude (90 HP, 2005-2001) – Outboard Engine
-   Evinrude (75 HP, 2005-2001) – Outboard Engine
-   Sherco 3.0 TRIALS 2T (300, 2013) – Motorcycle
-   Sherco 2.9 TRIALS - 2-STROKE (290, 2007-1999) – Motorcycle
-   Sherco 2.9 TRIALS 2T (290, 2013-2008) – Motorcycle
-   Sherco 2.5 TRIALS - 2-STROKE (250, 2007-1999) – Motorcycle
-   Sherco 2.5 TRIALS 2T (250, 2013-2008) – Motorcycle
-   Sherco 2.0 TRIALS - 2-STROKE (200, 2006-1999) – Motorcycle
-   Sherco 1.25 TRIALS - 2-STROKE (125, 2007-1999) – Motorcycle
-   Sherco 1.25 TRIALS 2T (125, 2014-2009) – Motorcycle
-   Sherco 0.8 TRIALS - 2-STROKE (79, 2007-1999) – Motorcycle
-   Sherco 0.8 TRIALS 2T (79, 2013-2009) – Motorcycle
-   Briggs & Stratton RAPTOR III (2009-2005) – Race Carts / Go-Kart
-   Argo 750 HDI 8X8 (750) – ATV
-   Argo 750 HDI SE 8X8 (750) – ATV
-   Argo 750 XTI 8X8 (750) – ATV
-   Argo 700 HD 8X8 (700) – ATV
-   Argo 700 HD EU 8X8 (700) – ATV
-   Argo AVENGER 8X8 - KOHLER AEGIS LH685 (674) – ATV
-   Argo 650 HD 6X6 (650) – ATV
-   Argo FRONTIER 8X8 (650) – ATV
-   Argo FRONTIER 6X6 (580) – ATV

That is the 25 most common of 155 applications NGK's charts list for this plug – ask us to check yours.

## 🔄 Supersession & Cross Reference

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

-   Champion: 3071, 3890, 9002, 9002-2, 9013, 9202, 9202-2, 9203 and 1 more
-   DENSO: 4701, 5303, IK16, IK16TT
-   Autolite: XP3924, XS5224, XS5224DP
-   Bosch: F8DPER, FR8DS
-   Beck Arnley: 1765281
-   Torch: K5RTP

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 39.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 39.00 AUD | In stock |

## Images

- BKR5EIX NGK iridium spark plug
- BKR5EIX NGK spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/bkr5eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03