# SILZNAR6D9 NGK Iridium Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Iridium Spark Plug – Part Number: SILZNAR6D9**

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: 94051
-   Thread: 12 mm
-   Reach: 25 mm
-   Hex: 14 mm
-   Type: Projected Tapered Solid

## 🚘 Application

Listed in NGK's application charts for automotive vehicles.

-   Chevrolet Spark (2017-2016) – 4 per engine
-   Chevrolet Volt (2017-2016) – 4 per engine

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 79.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 79.00 AUD | In stock |

## Images

- SILZNAR6D9 NGK iridium spark plug
- SILZNAR6D9 NGK iridium spark plug firing end

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/silznar6d9-ngk-iridium-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03