# BR7EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: BR7EIX**

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: 6664
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 20.8 mm (13/16 in)
-   Seat: Gasket
-   Type: 14mm Spark Plugs cont'd

## 🚘 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.

-   Flagship 300 (427 CID, 1974-1971) – Inboard Engine
-   Bombardier (Sea-Doo) GT (580, 1991-1990) – Personal Watercraft
-   Bombardier (Sea-Doo) GTS (580, 1997-1992) – Personal Watercraft
-   Bombardier (Sea-Doo) GTX (580, 1993-1992) – Personal Watercraft
-   Bombardier (Sea-Doo) SP (580, 1996-1988) – Personal Watercraft
-   Bombardier (Sea-Doo) SPi (580, 1997-1993) – Personal Watercraft
-   Bombardier (Sea-Doo) SPX (580, 1993) – Personal Watercraft
-   Bombardier (Sea-Doo) XP (580, 1993-1991) – Personal Watercraft
-   Kawasaki (Jet-Ski) 650SX (JS650) (650, 1990-1987) – Personal Watercraft
-   Kawasaki (Jet-Ski) 650SX (JS650) (650, 1995-1991) – Personal Watercraft
-   Kawasaki (Jet-Ski) JET MATE (JB650) (650, 1992-1989) – Personal Watercraft
-   Kawasaki (Jet-Ski) SC (JL650) (650, 1995-1991) – Personal Watercraft
-   Kawasaki (Jet-Ski) TS (JF650-B) (650, 1996-1989) – Personal Watercraft
-   Kawasaki (Jet-Ski) X2 (JF650-A) (650, 1995-1986) – Personal Watercraft
-   Kawasaki (Jet-Ski) 440SX (JS440) (440, 1992-1976) – Personal Watercraft
-   Kawasaki (Jet-Ski) 400SX (JS400) (400, 1976-1974) – Personal Watercraft
-   Kawasaki (Jet-Ski) 300SX (JS300) (300, 1991-1986) – Personal Watercraft
-   B.S.A. B44 (440) – Motorcycle
-   B.S.A. BANTAM 175 (175) – Motorcycle
-   B.S.A. BUSHMAN (175) – Motorcycle
-   B.S.A. D14 BANTAM (175) – Motorcycle
-   B.S.A. A10RGS – Motorcycle
-   B.S.A. A10RR – Motorcycle
-   B.S.A. A10SR – Motorcycle
-   B.S.A. A50 – Motorcycle

That is the 25 most common of 163 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.

-   Autolite: 2417, XS4064, XS4064DP
-   DENSO: 3095, W22ES-GU, W22ES-ZU
-   Bosch: W5CP, W5CS
-   Brisk: L15W, L17W
-   Magneti Marelli: CWP8L

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 31.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 31.00 AUD | In stock |

## Images

- BR7EIX NGK iridium spark plug
- BR7EIX NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/br7eix-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03