# ILTR5B11 NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: ILTR5B11**

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: 3474
-   Thread: 14 mm
-   Reach: 25 mm
-   Hex: 16 mm (5/8 in)
-   Seat: Tapered
-   Terminal: Solid
-   Type: Projected, Wide Gap

## 🚘 Application

Listed in NGK's application charts for automotive vehicles.

-   Buick Rainier (2007-2004) – 4-8 per engine
-   Cadillac Escalade (2017-2015) – 4-8 per engine
-   Cadillac Escalade ESV (2017-2015) – 4-8 per engine
-   Chevrolet Camaro (2017-2016) – 4-8 per engine
-   Chevrolet Cobalt (2008-2006) – 4-8 per engine
-   Chevrolet Colorado (2009-2004) – 4-8 per engine
-   Chevrolet Corvette (2017-2014) – 4-8 per engine
-   Chevrolet HHR (2008-2006) – 4-8 per engine
-   Chevrolet Malibu (2008-2007) – 4-8 per engine
-   Chevrolet Silverado 1500 (2017-2014) – 4-8 per engine
-   Chevrolet Suburban (2017-2015) – 4-8 per engine
-   Chevrolet Tahoe (2017-2015) – 4-8 per engine
-   Chevrolet Trailblazer (2009-2002) – 4-8 per engine
-   Chevrolet Trailblazer EXT (2006) – 4-8 per engine
-   Gmc Canyon (2009-2004) – 4-8 per engine
-   Gmc Envoy (2009-2002) – 4-8 per engine
-   Gmc Envoy XL (2006) – 4-8 per engine
-   Gmc Sierra 1500 (2017-2014) – 4-8 per engine
-   Gmc Yukon (2017-2015) – 4-8 per engine
-   Gmc Yukon XL (2017-2015) – 4-8 per engine
-   Hummer H3 (2009-2006) – 4-8 per engine
-   Hummer H3T (2009) – 4-8 per engine
-   Isuzu Ascender (2008-2003) – 4-8 per engine
-   Isuzu i-280 (2006) – 4-8 per engine
-   Isuzu i-290 (2008-2007) – 4-8 per engine

That is the 25 most common of 37 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: 4513, 4718, ITV16TT, PTV16TT
-   ACDelco: 12598004, 41-103

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 53.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 53.00 AUD | In stock |

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/iltr5b11-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03