# BPR9EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: BPR9EIX**

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: 6853
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 20.8 mm (13/16 in)
-   Seat: Gasket
-   Type: Projected

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment. The chart shows a 0.5 mm gap for these engines, but check it against your engine's manual before fitting.

-   Moto Guzzi V-50 II (500) – Motorcycle
-   Arctic Cat M 6000 (600, 2016-2015) – Snowmobile
-   Arctic Cat M 6000 ES (600, 2016-2015) – Snowmobile
-   Arctic Cat M 6000 LTD, ES (600, 2016) – Snowmobile
-   Arctic Cat M 6000 SNO PRO, ES (600, 2016-2014) – Snowmobile
-   Arctic Cat XF 6000 CROSS COUNTRY (600, 2015) – Snowmobile
-   Arctic Cat XF 6000 CROSSTOUR (600, 2015) – Snowmobile
-   Arctic Cat XF 6000 HIGH COUNTRY SNO PRO (600, 2015) – Snowmobile
-   Arctic Cat XF 6000 LXR (600, 2015) – Snowmobile
-   Arctic Cat XF 6000 SNO PRO ES, LTD (600, 2015) – Snowmobile
-   Arctic Cat ZR 6000 EL TIGRE, ES (600, 2016-2014) – Snowmobile
-   Arctic Cat ZR 6000 LTD ES (600, 2016) – Snowmobile
-   Arctic Cat ZR 6000 LXR, ES (600, 2016-2015) – Snowmobile
-   Arctic Cat ZR 6000 R XC (600, 2015) – Snowmobile
-   Arctic Cat ZR 6000 SNO PRO ES, LTD ES (600, 2016-2015) – Snowmobile
-   Arctic Cat ZR 6000 SNO PRO RR (600, 2015-2014) – Snowmobile
-   Arctic Cat ZR 6000 TUCKER HIBBERT RR (600, 2015) – Snowmobile
-   Polaris FUSION - LIBERTY ENGINE (900, 2006-2004) – Snowmobile
-   Polaris RMK (900, 2006-2005) – Snowmobile
-   Polaris SWITCHBACK (900, 2006-2005) – Snowmobile
-   Polaris 800 AXYS PRO RMK 155, 163 (800, 2016) – Snowmobile
-   Polaris 800 AXYS SKS 155 (800, 2016) – Snowmobile
-   Polaris 800 CLASSIC EDGE, TOURING (800, 2005-2003) – Snowmobile
-   Polaris 800 DRAGON (800, 2010-2008) – Snowmobile
-   Polaris 800 INDY SP, ES (800, 2016-2014) – Snowmobile

That is the 25 most common of 108 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: 937, RN57YC

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 40.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 40.00 AUD | In stock |

## Images

- BPR9EIX NGK iridium spark plug
- BPR9EIX NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/bpr9eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03