# DCPR8EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: DCPR8EIX**

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: 6546
-   Thread: 12 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 16 mm (5/8 in)
-   Seat: Gasket
-   Type: Projected

## 🚘 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.

-   Bombardier (Sea-Doo) 150 SPEEDSTER (1494 cc, 2011-2007) – Inboard Engine
-   Bombardier (Sea-Doo) 180 CHALLENGER (1494 cc, 2011-2006) – Inboard Engine
-   Bombardier (Sea-Doo) 180 SP (1494 cc, 2011) – Inboard Engine
-   Bombardier (Sea-Doo) 200 SPEEDSTER (1494 cc, 2011-2006) – Inboard Engine
-   Bombardier (Sea-Doo) 205 UTOPIA (1494 cc, 2009-2006) – Inboard Engine
-   Bombardier (Sea-Doo) 210 CHALLENGER (1494 cc, 2011-2010) – Inboard Engine
-   Bombardier (Sea-Doo) 210 SP (1494 cc, 2011) – Inboard Engine
-   Bombardier (Sea-Doo) 210 WAKE (1494 cc, 2011-2010) – Inboard Engine
-   Bombardier (Sea-Doo) 230 CHALLENGER (1494 cc, 2011-2007) – Inboard Engine
-   Bombardier (Sea-Doo) 230 SP (1494 cc, 2011) – Inboard Engine
-   Bombardier (Sea-Doo) 230 WAKE (1494 cc, 2011-2008) – Inboard Engine
-   Bombardier (Sea-Doo) CHALLENGER 180 (1494 cc, 2007-2006) – Inboard Engine
-   Bombardier (Sea-Doo) CHALLENGER 180 4-TEC (1498 cc, 2005) – Inboard Engine
-   Bombardier (Sea-Doo) CHALLENGER 230 (1494 cc, 2007) – Inboard Engine
-   Bombardier (Sea-Doo) CHALLENGER 230 WAKE (1494 cc, 2008-2007) – Inboard Engine
-   Bombardier (Sea-Doo) CHALLENGER CS (1494 cc, 2006) – Inboard Engine
-   Bombardier (Sea-Doo) ISLANDIA 220 (1494 cc, 2007-2006) – Inboard Engine
-   Bombardier (Sea-Doo) ISLANDIA SE (1494 cc, 2009-2008) – Inboard Engine
-   Bombardier (Sea-Doo) SPEEDSTER 150 (1494 cc, 2007) – Inboard Engine
-   Bombardier (Sea-Doo) SPEEDSTER 200 (1494 cc, 2007-2006) – Inboard Engine
-   Bombardier (Sea-Doo) SPEEDSTER 200 TWIN 4-TEC 3.0L (1498 cc, 2005) – Inboard Engine
-   Bombardier (Sea-Doo) SPEEDSTER WAKE (1494 cc, 2009-2007) – Inboard Engine
-   Bombardier (Sea-Doo) SPORTSTER 4-TEC (1494 cc, 2006) – Inboard Engine
-   Bombardier (Sea-Doo) UTOPIA 205 (1494 cc, 2007-2006) – Inboard Engine
-   Bombardier (Sea-Doo) GTI (1500, 2015) – Personal Watercraft

That is the 25 most common of 250 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.

-   DENSO: 3234, 3243, 5309, IXU24, XU24EP-ZU, XU24EPR-P, XU24EPR-ZU
-   Harley Davidson/Screamin' Eagle: 31600105, 32186-10, 32321-91, EX12P, HD10R12, HD10R12A
-   Harley-Davidson: 31600105, 32186-10, 32321-91, EX12P, HD10R12, HD10R12A
-   Champion: 9701, RA8WHP
-   Bosch: Y5DDC

## 📦 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 |

## Images

- DCPR8EIX NGK iridium spark plug
- DCPR8EIX NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/dcpr8eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03