---
product_id: 30955245
title: "CR9EIX - Iridium IX Spark Plug - 4-Pack/--"
brand: "ngk"
price: "€ 72.29"
currency: EUR
in_stock: true
url: https://www.desertcart.de/products/30955245-cr9eix-iridium-ix-spark-plug-4-pack
store_origin: DE
region: Germany
---

# Iridium core for max spark efficiency 4-pack for full engine refresh Direct OEM replacement fit CR9EIX - Iridium IX Spark Plug - 4-Pack/--

**Brand:** ngk
**Price:** € 72.29
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** CR9EIX - Iridium IX Spark Plug - 4-Pack/-- by ngk
- **How much does it cost?** € 72.29 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/30955245-cr9eix-iridium-ix-spark-plug-4-pack)

## 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

- • **OEM-Grade Reliability:** Genuine NGK parts ensure perfect fit and consistent performance tailored to your vehicle’s specs.
- • **Complete Spark Plug Set:** Four plugs included to upgrade your entire engine’s ignition system in one go—no compromises.
- • **Lightweight & Compact Design:** At just 4.5 ounces and compact dimensions, these plugs optimize engine space without added bulk.
- • **Precision Iridium Performance:** Experience superior ignition with ultra-durable iridium tips for enhanced fuel efficiency and smoother starts.
- • **Versatile Vehicle Compatibility:** Engineered for cars and trucks with vehicle-specific fitment, guaranteeing hassle-free installation.

## Overview

The NGK CR9EIX Iridium IX Spark Plug 4-pack delivers OEM-quality ignition performance with durable iridium tips, ensuring efficient combustion and reliable starts. Designed for vehicle-specific fitment, these lightweight plugs provide a direct replacement solution for cars and trucks, making them an essential upgrade for any engine enthusiast.

## Description

CR9EIX - Iridium IX Spark Plug - 4-Pack/--

## Features

- 4 pack NGK Iridium IX 3521 Spark Plug
- Genuine NGK Parts
- Includes original packaging and hardware
- Direct replacement auto parts
- Confirm vehicle fitment with desertcart Confirmed Fit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004SKYAWM |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #17,108 in Automotive ( See Top 100 in Automotive ) #86 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.8 4.8 out of 5 stars (471) |
| Date First Available | April 10, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 4.5 ounces |
| Item model number | 3521 |
| Manufacturer | NGK |
| Manufacturer Part Number | CR9EIX |
| Model | 4 pack NGK Iridium IX 3521 Spark Plug |
| OEM Part Number | 7085731 |
| Position | Front, Rear |
| Product Dimensions | 3.31 x 0.94 x 3.32 inches |
| Thread Size | 10mm |
| Top Material Type | Iridium |
| Vehicle Service Type | Car, Truck |

## Product Details

- **Brand:** NGK
- **Core Material:** Iridium
- **Thread Size:** 10mm
- **Top Material Type:** Iridium
- **Vehicle Service Type:** Car, Truck

## Images

![CR9EIX - Iridium IX Spark Plug - 4-Pack/-- - Image 1](https://m.media-amazon.com/images/I/61wBxBvQUhL.jpg)

## Questions & Answers

**Q: Are these ngk 3521 cr9eix iridium ix spark plugs?**
A: These are correct and they perform flawlessly! Ron

**Q: Will these fit a 2019 polaris rzr turbo s**
A: To be safe: check with dealer or a cross reference app to be sure. Ron

**Q: Will this work on my Harley Davidson 2018 street glide special?**
A: I have a 2017 Road King with the Milwaukee 8 and this is the one it calls for.

**Q: Are these the right iridium plugs for an Indian scout 60?**
A: NGK has multiple grades of plugs that may fit your engine.  
It is recommended to go to NGK site at
https://ngksparkplugs.com/en/part-finder to verify the applications that will fit your engine.
This site will show you all of the available plugs to fit your engine and will also show you which grade plug is recommended for the best performance of your specific engine.

## Frequently Bought Together

- NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/--
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- K&N Engine Air Filter: High Performance, Premium, Powersport Air Filter: Fits 2006-2010 SUZUKI (GSXR600, GSXR750) SU-7506

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**Shop now:** [https://www.desertcart.de/products/30955245-cr9eix-iridium-ix-spark-plug-4-pack](https://www.desertcart.de/products/30955245-cr9eix-iridium-ix-spark-plug-4-pack)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-03-02*