---
product_id: 433491681
title: "E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology"
brand: "e3"
price: "€ 31.91"
currency: EUR
in_stock: false
reviews_count: 5
category: "E3"
url: https://www.desertcart.sk/products/433491681-e3-spark-plugs-e3-109-premium-racing-spark-plug-diamondfire
store_origin: SK
region: Slovakia
---

# 14mm thread for universal racing fit Boosts power & reduces fuel consumption DiamondFIRE tech for faster flame propagation E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology

**Brand:** e3
**Price:** € 31.91
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Ignite your engine’s true potential — race smarter, not harder!

## Quick Answers

- **What is this?** E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology by e3
- **How much does it cost?** € 31.91 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/433491681-e3-spark-plugs-e3-109-premium-racing-spark-plug-diamondfire)

## Best For

- e3 enthusiasts

## Why This Product

- Trusted e3 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Full-size center electrode and rugged alloy steel construction ensure extended lifespan under extreme conditions.
- • **DiamondFIRE Edge:** Patented dual-leg ground electrode delivers unmatched heat transfer and stable, edge-to-edge spark performance.
- • **Fuel-Smart Power:** Optimizes combustion to increase horsepower while cutting fuel use and hydrocarbon emissions.
- • **Race-Ready Precision:** 14mm thread & 0.708” reach engineered for high-RPM engines and universal racing compatibility.
- • **Plug & Play Confidence:** Cross-compatible with top brands like Autolite, Champion, and NGK, backed by a limited lifetime warranty.

## Overview

The E3.109 Premium Racing Spark Plug features patented DiamondFIRE technology with a dual-leg ground electrode for superior heat transfer and faster flame propagation. Designed with a 14mm thread and 0.708” reach, it fits high-performance racing engines, boosting power, improving fuel efficiency, and reducing emissions. Compatible with major spark plug brands and built for durability, it’s the ultimate upgrade for serious racers and performance enthusiasts.

## Description

The E3.109 racing spark plug is a high-performance component designed for a variety of racing applications, built with a 14mm thread diameter, 0.708” reach, and a 5/8” hex. Featuring a taper seat and cold heat range, the E3.109 is a non-resistor spark plug that provides optimal performance in high-RPM engines. This spark plug is similar to the E3.108, but it comes with a distinct heat range and a projected core nose for enhanced functionality. Fitted with E3's patented DiamondFIRE ground electrode, our spark plug creates an edge-to-edge spark path, ensuring improved combustion by replenishing the spark zone with a fresh fuel/air charge. This results in faster, more efficient engine operation. The electrode is secured with two legs, allowing for excellent heat transfer and additional stability, which is essential for performance in high-RPM engines. The spark plug significantly increases engine power, reduces fuel consumption, and lowers hydrocarbon emissions over time. Its full-size center electrode and DiamondFIRE ground electrode also extend the product's lifespan while ensuring optimal performance. This spark plug is cross-compatible with Autolite AR93, AR94; Champion 280, 685, S59YC, S61YC; and NGK 7891, R5724-9.

Review: I've been a mechanic since 1975, what people don't understand is that they don't have to put the spark plus that they call for in your lawnmower. I use the E3 plug. My lawnmower starts easy an I use less gas. Clean the plug an it will last a long time.
Review: Good plugs, gave me 10 more hp and good gas mileage

## Features

- HIGH-PERFORMANCE DESIGN: Built for racing applications, the E3.109 spark plug is engineered to increase power, reduce fuel consumption, and improve hydrocarbon emissions
- DIAMONDFIRE TECHNOLOGY: Features E3’s patented DiamondFIRE ground electrode secured with dual legs for excellent heat transfer and unmatched performance stability
- OPTIMAL ENGINE EFFICIENCY: The patented DiamondFIRE ground electrode design enhances engine stability by promoting faster flame propagation, enabling a more complete burn of the fuel/air mixture
- RACING-SPECIFICATIONS: Specifically designed for high-performance racing applications, this spark plug features a 14mm thread, 0.708” reach, 5/8” hex, and a taper seat
- COMPATIBILITY AND DURABILITY: Cross-compatible with Autolite AR93, AR94; Champion 280, 685, S59YC, S61YC; and NGK 7891, R5724-9; backed by a limited lifetime warranty, ensuring long-lasting durability and reliable performance

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01JLYM1D4 |
| Assembly Required | No |
| Automotive Fit Type | Universal Fit |
| Brand | E3 |
| Core Material | Copper |
| Country of Origin | USA |
| Customer Reviews | 4.2 4.2 out of 5 stars (57) |
| Date First Available | 6 May 2020 |
| Exterior | Machined |
| Generic Name | Spark Plug |
| Global Trade Identification Number | 00894489000053 |
| Item Dimensions LxWxH | 25 x 102 x 152 Millimeters |
| Item Weight | 45.4 g |
| Item model number | E3.109 |
| Manufacturer | E3 Spark Plugs |
| Manufacturer Part Number | E3.109 |
| Model | E3 Race Spark Plug |
| Net Quantity | 1.0 Count |
| OEM Part Number | E3.109 |
| Product Dimensions | 2.54 x 10.16 x 15.24 cm; 45.36 g |
| Thread Size | 14mm |
| Top Material Type | Alloy Steel |
| UPC | 894489000053 |
| Vehicle Service Type | Motorcycle |

## Product Details

- **Brand:** E3
- **Core Material:** Copper
- **Thread Size:** 14mm
- **Top Material Type:** Alloy Steel
- **Vehicle Service Type:** Motorcycle

## Images

![E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology - Image 1](https://m.media-amazon.com/images/I/41NfqoFB8wL.jpg)
![E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology - Image 2](https://m.media-amazon.com/images/I/41aKHc-eS8L.jpg)
![E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology - Image 3](https://m.media-amazon.com/images/I/51FyQbcdkCL.jpg)
![E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology - Image 4](https://m.media-amazon.com/images/I/61IDpPrIzML.jpg)
![E3 Spark Plugs E3.109 Premium Racing Spark Plug with DiamondFIRE Technology - Image 5](https://m.media-amazon.com/images/I/71NnLYKCT7L.jpg)

## Questions & Answers

**Q: Is the gap at 44mm ?**
A: E3.109 is a race plug. The gap for this plug is approximately 25 thousands.

**Q: E-3 spark plug for mtd 951-10292?**
A: E3.22 is the replacement for MTD 951-10292.

**Q: Will this fit my dodge charger RT  2006 with a 5.7 hemi in it if not which E3 plug will it take it?**
A: looked on Google, found that  e3 614 plugs fit the 5.7l hemi

**Q: Do you have a replacement plug for a ngk bpr 2 es ?**
A: No

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***E on 31 May 2024*

I've been a mechanic since 1975, what people don't understand is that they don't have to put the spark plus that they call for in your lawnmower. I use the E3 plug. My lawnmower starts easy an I use less gas. Clean the plug an it will last a long time.

### ⭐⭐⭐⭐⭐ Review
*by R***E on 30 January 2025*

Good plugs, gave me 10 more hp and good gas mileage

### ⭐⭐⭐⭐⭐ Review
*by G***P on 7 October 2023*

Work very well w cold air intake and a performance chip added about 50 more hourse power

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**Shop now:** [https://www.desertcart.sk/products/433491681-e3-spark-plugs-e3-109-premium-racing-spark-plug-diamondfire](https://www.desertcart.sk/products/433491681-e3-spark-plugs-e3-109-premium-racing-spark-plug-diamondfire)

---

*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-04*