# BPR5EIX-11 NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: BPR5EIX-11**

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: 2115
-   Thread: 14 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 20.8 mm (13/16 in)
-   Seat: Gasket
-   Terminal: Solid
-   Type: Projected, Wide Gap

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment and automotive vehicles. The chart shows a 1.0 mm gap for these engines, but check it against your engine's manual before fitting.

-   American Iron Horse BANDIT ST (1852, 2003-1999) – Motorcycle
-   American Iron Horse CLASSIC SX (1852, 2003-1999) – Motorcycle
-   American Iron Horse LEGEND SC (1852, 2003-1999) – Motorcycle
-   American Iron Horse OUTLAW SY (1852, 2003-1999) – Motorcycle
-   American Iron Horse SLAMMER SZ (1852, 2003-1999) – Motorcycle
-   American Iron Horse STALKER SR (1852, 2003-1999) – Motorcycle
-   American Iron Horse THUNDER SW (1852, 2003-1999) – Motorcycle
-   American Iron Horse BANDIT ST (1753, 2003-1999) – Motorcycle
-   American Iron Horse CLASSIC SX (1753, 2003-1999) – Motorcycle
-   American Iron Horse LEGEND SC (1753, 2003-1999) – Motorcycle
-   American Iron Horse OUTLAW SY (1753, 2003-1999) – Motorcycle
-   American Iron Horse SLAMMER SZ (1753, 2003-1999) – Motorcycle
-   American Iron Horse STALKER SR (1753, 2003-1999) – Motorcycle
-   American Iron Horse THUNDER SW (1753, 2003-1999) – Motorcycle
-   American Iron Horse BANDIT ST (1573, 2002-1999) – Motorcycle
-   American Iron Horse CLASSIC SX (1573, 2002-1999) – Motorcycle
-   American Iron Horse LEGEND SC (1573, 2002-1999) – Motorcycle
-   American Iron Horse OUTLAW SY (1573, 2002-1999) – Motorcycle
-   American Iron Horse SLAMMER SZ (1573, 2002-1999) – Motorcycle
-   American Iron Horse STALKER SR (1573, 2002-1999) – Motorcycle
-   American Iron Horse THUNDER SW (1573, 2002-1999) – Motorcycle
-   American Performance Cycle HIGH ROLLER S - S&S ENGINE 96 CU IN (1573) – Motorcycle
-   American Performance Cycle SPIRIT S - S&S ENGINE 96 CU IN (1573) – Motorcycle
-   Big Dog ALL MODELS - S&S ENGINE 107 CU IN (1750) – Motorcycle
-   Big Dog ALL MODELS (1507) – Motorcycle

That is the 25 most common of 149 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: 3322, 3322-2, 9007, 9804, 9804-2, RN10WYPB5
-   Harley Davidson/Screamin' Eagle: 32189-10, 32323-91, 32326-91, EVS13S, SH13S
-   Harley-Davidson: 32189-10, 32323-91, 32326-91, EVS13S, SH13S
-   Bosch: 4219, 4221, WR8DPX, WR9DPX
-   DENSO: 4708, 5305, IW16, IW16TT
-   Autolite: XP646, XP646DP2
-   Beck Arnley: 1765306

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 38.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 38.00 AUD | In stock |

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/bpr5eix-11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03