# R5674-7 NGK Standard Racing Spark Plug | Genuine NGK Spark Plug

## 🔧 Product Description

**NGK Standard Racing Spark Plug – Part Number: R5674-7**

NGK racing spark plugs are built for sustained high-RPM, high-temperature competition use, with precious-metal electrodes and cold heat ranges chosen for heavily loaded engines. Racing plugs are application-specific – heat range selection is critical, so confirm the specification for your engine before fitting.

## ⚙️ Key Features

-   Competition-grade construction for sustained high RPM and cylinder temperatures
-   Cold heat range for heavily loaded engines
-   Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
-   Triple seals prevent leakage

## 📏 Specifications

-   NGK stock number: 5034
-   Thread: Racing Spark Plugs
-   Reach: .460"
-   Hex: 16 mm (5/8 in)
-   Seat: Tapered
-   Terminal: Solid
-   Type: V-Power Projected Non-Resistor

## 🚘 Application

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

-   Crusader 185 (292 CID, 1980-1971) – Inboard Engine
-   Crusader 210 (307 CID, 1980-1971) – Inboard Engine
-   Crusader 427 (427 CID, 1980-1968) – Inboard Engine
-   Flagship (300 CID, HEAVY SERVICE, 1977) – Inboard Engine
-   Flagship (305 CID, HEAVY SERVICE, 1993-1975) – Inboard Engine
-   Flagship (350 CID, HEAVY SERVICE, 1993-1975) – Inboard Engine
-   Flagship (454 CID, HEAVY SERVICE, 1993-1975) – Inboard Engine
-   Flagship 335 (350 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine
-   Flagship 280E (280 CID, 1977-1975) – Inboard Engine
-   Flagship 295FAS (350 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine
-   Flagship 380FAS (350 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine
-   Flagship 400FAJ (454 CID, HI PERFORMANCE, 1977-1975) – Inboard Engine
-   Flagship 400FAS (454 CID, HI PERFORMANCE, 1977-1975) – Inboard Engine
-   Flagship 450FAJ (454 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine
-   Flagship 450FAS (454 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine
-   Flagship 460FAJ (454 CID, HI PERFORMANCE, 1977-1975) – Inboard Engine
-   Flagship 460FAS (454 CID, HI PERFORMANCE, 1977-1975) – Inboard Engine
-   Flagship 500FAJ (454 CID, HI PERFORMANCE, 1977-1975) – Inboard Engine
-   Flagship 500FAJ (490 CID, HI PERFORMANCE, 1981-1975) – Inboard Engine
-   Flagship 500FAS (454 CID, HI PERFORMANCE, 1977-1975) – Inboard Engine
-   Flagship 500FAS (490 CID, HI PERFORMANCE, 1981-1975) – Inboard Engine
-   Flagship 675FAJ (NORMAL USE) (466 CID, HI PERFORMANCE, 1981-1975) – Inboard Engine
-   Flagship 675FAS (NORMAL USE) (466 CID, HI PERFORMANCE, 1981-1975) – Inboard Engine
-   Flagship TC400 (350 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine
-   Flagship TC550 (454 CID, HI PERFORMANCE, 1993-1975) – Inboard Engine

## 🔄 Supersession & Cross Reference

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

-   Autolite: 12, AR12, AR13
-   Accel: 274, 574
-   ACDelco: 40TS
-   Champion: BL7Y
-   Motorcraft: AF12

## 📦 Condition

-   Brand new genuine product
-   Supplied in original packaging

## Details

- **Price:** 19.0 AUD
- **Vendor:** NGK
- **Type:** Ignition & Controls

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 19.00 AUD | In stock |

## Images

- R5674-7 NGK racing spark plug

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/r5674-7-ngk-standard-racing-spark-plug-genuine-ngk-spark-plug)
> Updated: 2026-09-03