# IZTR5B11 NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: IZTR5B11**

NGK iridium spark plugs feature an iridium alloy on the centre electrode, welded on with a laser – one of the world's hardest metals, with a melting point of 2450°C, giving very high resistance to spark erosion and, on average, double the service life of a standard nickel spark plug.

## ⚙️ Key Features

-   Fine iridium-tipped centre electrode and platinum-tipped ground electrode for a slow wear rate, stable idle, improved fuel efficiency and lower emissions
-   Longer service life
-   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
-   Triple seals prevent leakage
-   Copper core aids in heat removal

## 📏 Specifications

-   NGK stock number: 1465
-   Thread: 14 mm
-   Reach: .708"
-   Hex: 16 mm (5/8 in)
-   Seat: Tapered
-   Terminal: Solid
-   Type: Extended Projection Wide Gap

## 🚘 Application

Listed in NGK's application charts for automotive vehicles.

-   Buick Allure (2009-2008) – 8 per engine
-   Buick LaCrosse (2009-2008) – 8 per engine
-   Buick Rainier (2007-2004) – 8 per engine
-   Cadillac CTS (2007-2004) – 8 per engine
-   Cadillac Escalade (2000-1999) – 8 per engine
-   Cadillac Escalade (2014-2002) – 8 per engine
-   Cadillac Escalade ESV (2014-2003) – 8 per engine
-   Cadillac Escalade EXT (2013-2002) – 8 per engine
-   Chevrolet Avalanche (2013-2007) – 8 per engine
-   Chevrolet Avalanche 1500 (2006-2002) – 8 per engine
-   Chevrolet C1500 (1999-1998) – 8 per engine
-   Chevrolet C1500 Suburban (1999-1998) – 8 per engine
-   Chevrolet C2500 (2000-1998) – 8 per engine
-   Chevrolet C2500 Suburban (1999-1998) – 8 per engine
-   Chevrolet C3500 (2000-1998) – 8 per engine
-   Chevrolet Camaro (2002-1998) – 8 per engine
-   Chevrolet Camaro (2015-2010) – 8 per engine
-   Chevrolet Caprice (1996-1994) – 8 per engine
-   Chevrolet Caprice (2017-2011) – 8 per engine
-   Chevrolet Colorado (2012-2009) – 8 per engine
-   Chevrolet Corvette (1995-1993) – 8 per engine
-   Chevrolet Corvette (2013-1997) – 8 per engine
-   Chevrolet Express 1500 (2014-1998) – 8 per engine
-   Chevrolet Express 2500 (2017-1998) – 8 per engine
-   Chevrolet Express 3500 (2017-1998) – 8 per engine

That is the 25 most common of 96 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.

-   Bosch: 4509, 7421, 9602, HGR9LQI0, HR8LII33U, HR9LI33U
-   ACDelco: 12571164, 12621258, 41-110, 41-985
-   DENSO: 4511, 4713, IT16TT, PT16TT

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 26.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 26.00 AUD | In stock |

## Images

- IZTR5B11 NGK iridium spark plug
- IZTR5B11 NGK iridium spark plug firing end

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/iztr5b11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03