# DPR8Z NGK Standard Resistor Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Resistor Spark Plug – Part Number: DPR8Z**

Spark plugs are a critical engine component, providing the spark that ignites the air-fuel mixture that drives an engine. NGK spark plugs feature trivalent plating – a silver/chrome-coloured finish on the threads – for corrosion resistance against moisture and chemicals, and are designed to meet or exceed OE standards.

## ⚙️ Key Features

-   Standard nickel centre electrode
-   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: 4730
-   Thread: 12 mm
-   Reach: 19 mm (3/4 in)
-   Hex: 18 mm
-   Seat: Gasket
-   Terminal: Threaded stud
-   Type: Projected, Extended Shell

## 🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment. The chart shows a 0.5 mm gap for these engines, but check it against your engine's manual before fitting.

-   Honda XR400R (400, 2004-1996) – Motorcycle
-   Honda XR250L (250, 1996-1991) – Motorcycle
-   Honda FOURTRAX 400EX - TRX400EX (400, 2000-1999) – ATV
-   Honda SPORTTRAX 400EX - TRX400EX (400, 2009-1999) – ATV
-   Honda TR400X (400, 2009) – ATV
-   Honda TRX400X (400, 2014-2013) – ATV

## 🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

-   DENSO: 4106, X22GPR-U, X24GPR-U

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 24.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 24.00 AUD | In stock |

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/dpr8z-ngk-standard-resistor-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03