---
product_id: 4076312
title: "NGK (3521) CR9EIX Iridium IX Spark Plug, Pack of 1"
brand: "ngk"
price: "11219 Ft"
currency: HUF
in_stock: true
reviews_count: 8
category: "Ngk"
url: https://www.desertcart.hu/products/4076312-ngk-3521-cr9eix-iridium-ix-spark-plug-pack-of-1
store_origin: HU
region: Hungary
---

# 0.6mm ultra-fine iridium tip extremely high melting point alloy superior anti-corrosion & anti-seizing NGK (3521) CR9EIX Iridium IX Spark Plug, Pack of 1

**Brand:** ngk
**Price:** 11219 Ft
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with NGK Iridium IX – where precision meets power!

## Quick Answers

- **What is this?** NGK (3521) CR9EIX Iridium IX Spark Plug, Pack of 1 by ngk
- **How much does it cost?** 11219 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/4076312-ngk-3521-cr9eix-iridium-ix-spark-plug-pack-of-1)

## Best For

- ngk enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Durable iridium alloy resists wear and corrosion, ensuring long-lasting reliability under extreme conditions.
- • **Smooth Ride Guaranteed:** Trusted by riders and drivers alike for consistent, buttery-smooth engine starts and runs.
- • **Precision Ignition Power:** Ultra-fine 0.6mm iridium electrode delivers sharper, more efficient sparks for peak engine performance.
- • **Optimized for High-Tech Engines:** Designed for modern high-performance vehicles, handling intense heat without pre-detonation risks.
- • **Engineered for FOMO-Worthy Performance:** Join thousands upgrading to NGK Iridium IX and experience the spark plug that’s #1 in automotive innovation.

## Overview

The NGK CR9EIX Iridium IX spark plug features an ultra-fine 0.6mm iridium center electrode that enhances ignition efficiency and durability. Engineered with a high melting point iridium alloy, it offers superior anti-corrosion and anti-seizing properties, making it ideal for high-performance cars and trucks. This spark plug ensures reliable, smooth engine operation and is highly rated by users for its quality and longevity.

## Description

NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. The iridium center electrode is both stronger and harder than platinum. This allows NGK engineers to design an ultra-fine (0.6mm)center electrode reducing the vol

Review: Perfect for Yamaha FZ09 - Received high quality NGK iridium plugs as expected. Works perfect for my Yamaha FZ09 and she runs smooth as butter. Note: just use pliers to gently unscrew the metal top. You install without them for FZ09.
Review: found out that it's good practice to go down one heat range in plugs ... - I went to these plugs for my FJR1300 after dealing with a pre-detonation I was attempting to resolve. The FJR calls for a one step hotter plug in the standard, copper plug configuration. After much research, found out that it's good practice to go down one heat range in plugs when substituting to an iridium from copper - especially when dealing with extreme hot weather conditions ( last time I rode it was 111F). Iridium plugs burn a bit hotter due to their construction (small tip design and low heat dissipation properties). In extreme heat iridium plugs can act like glow plugs, causing pre-detonation, which is what I was experiencing. After going to this one step cooler plug, performance was back to normal.

## Features

- You can depend on NGK for quality and reliability
- Constructed from durable material
- Fine Iridium tip ensures high durability
- Features superior anti-corrosion and anti-seizing properties
- Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000CSGWZM |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #73,660 in Automotive ( See Top 100 in Automotive ) #476 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Brand Name | NGK |
| Compatible with Vehicle Type | Car, Truck |
| Core Material | Iridium |
| Customer Reviews | 4.6 out of 5 stars 1,027 Reviews |
| Global Trade Identification Number | 00087295035214, 00087295135211 |
| Included Components | 3521 |
| Item Weight | 0.03 Kilograms |
| Manufacturer | NGK Spark Plugs |
| Manufacturer Part Number | CR9EIX |
| Manufacturer Warranty Description | Includes manufacturer provided warranty |
| Top Material Type | Metal |
| UPC | 087295135211 779422204029 087295035214 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Car, Truck |

## Product Details

- **Brand:** NGK
- **Core Material:** Iridium
- **Global Trade Identification Number:** 00087295035214, 00087295135211
- **Top Material Type:** Metal
- **Vehicle Service Type:** Car, Truck

## Images

![NGK (3521) CR9EIX Iridium IX Spark Plug, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/81T1drTUJQL.jpg)

## Questions & Answers

**Q: What gap do these usually come with from the factory?**
A: If I remember correctly it was around .028", but it is always best to double check and make sure they are correct for your application.

**Q: dos it fits yamaha r1 2009?**
A: Yup your good

**Q: Correct fitment for a  2015 Triumph Street Triple 675 ?**
A: Yes but some people like them others do not so it's up to you.

**Q: Does it fit for suzuki gsxr 1000 2017**
A: I installed it on my 1999 Hayabusa, not sure about the GSXR 1000, I assume it would work, check on youtube and search if others have used it on google search

## Customer Reviews

### ⭐⭐⭐⭐⭐ Perfect for Yamaha FZ09
*by I***N on July 27, 2020*

Received high quality NGK iridium plugs as expected. Works perfect for my Yamaha FZ09 and she runs smooth as butter. Note: just use pliers to gently unscrew the metal top. You install without them for FZ09.

### ⭐⭐⭐⭐⭐ found out that it's good practice to go down one heat range in plugs ...
*by R***N on July 31, 2016*

I went to these plugs for my FJR1300 after dealing with a pre-detonation I was attempting to resolve. The FJR calls for a one step hotter plug in the standard, copper plug configuration. After much research, found out that it's good practice to go down one heat range in plugs when substituting to an iridium from copper - especially when dealing with extreme hot weather conditions ( last time I rode it was 111F). Iridium plugs burn a bit hotter due to their construction (small tip design and low heat dissipation properties). In extreme heat iridium plugs can act like glow plugs, causing pre-detonation, which is what I was experiencing. After going to this one step cooler plug, performance was back to normal.

### ⭐⭐⭐⭐⭐ Perfect upgrade for Yamaha Jet boats
*by T***8 on July 18, 2016*

I had purchased my first set of these last year (2015) as a spare set of plugs to keep in my Yamaha AR210 twin engine jet boat. The OEM NGK plugs are known to have short life span due to the high revving of the engines in these boats. This is the first season I have them Installed in the boat and I am certainly not dissapointed. The engines start better and perform better. I will be using these plugs going forward.

## Frequently Bought Together

- NGK Pack of 4 Motorcycle Spark Plugs No CR9EIX, Threaded Top, Per 4
- K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils: Fits Select Honda, Kawasaki, Triumph, Yamaha Motorcycles, KN-204-1
- Motul 100948 RBF 600 RACING BRAKE FLUID 0.5L - Grey

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**Shop now:** [https://www.desertcart.hu/products/4076312-ngk-3521-cr9eix-iridium-ix-spark-plug-pack-of-1](https://www.desertcart.hu/products/4076312-ngk-3521-cr9eix-iridium-ix-spark-plug-pack-of-1)

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-03-03*