---
product_id: 457717869
title: "CR9EIX - Iridium IX Spark Plug - 4-Pack/-"
brand: "ngk"
price: "₨1407"
currency: SCR
in_stock: true
reviews_count: 5
category: "Ngk"
url: https://www.desertcart.sc/products/457717869-cr9eix-iridium-ix-spark-plug-4-pack
store_origin: SC
region: Seychelles
---

# Iridium IX for superior ignition Enhanced combustion efficiency Direct OEM replacement fit CR9EIX - Iridium IX Spark Plug - 4-Pack/-

**Brand:** ngk
**Price:** ₨1407
**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?** ₨1407 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/457717869-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 Quality:** Genuine NGK parts with original packaging and hardware for guaranteed fit and performance.
- • **Proven Performance:** Ranked #142 in Automotive Performance Spark Plugs with a stellar 4.8-star rating from 466 users.
- • **Quad-Pack Convenience:** Four spark plugs in one set—perfect for full tune-ups or multiple vehicles.
- • **Universal Compatibility:** Designed to fit front and rear positions, confirmed vehicle fitment via desertcart.
- • **Precision Ignition Power:** Iridium IX electrode ensures faster, more reliable starts every time.

## Overview

The NGK CR9EIX Iridium IX Spark Plug 4-pack delivers premium ignition performance with durable iridium electrodes, ensuring faster starts and improved fuel efficiency. Trusted by professionals and ranked among top automotive performance plugs, this genuine NGK product offers direct OEM replacement fitment, making it the go-to choice for millennial managers seeking reliability and peak engine performance.

## Description

Genuine 4 pack NGK Iridium IX 3521 Spark Plug

Review: Good item would buy again
Review: They Look good ngk quality plugs

## 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 |
| Best Sellers Rank | #25,843 in Automotive ( See Top 100 in Automotive ) #142 in Automotive Performance Spark Plugs |
| Brand | NGK |
| Customer Reviews | 4.8 4.8 out of 5 stars (466) |
| Date First Available | 16 July 2021 |
| Item Weight | 127 g |
| 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 | 8.41 x 2.39 x 8.43 cm; 127.01 g |

## Product Details

- **Brand:** NGK
- **Core material:** Iridium
- **Thread size:** 10mm
- **Top material type:** Iridium
- **Vehicle service type:** Car

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***T on 23 August 2024*

Good item would buy again

### ⭐⭐⭐⭐⭐ Review
*by R***R on 30 November 2025*

They Look good ngk quality plugs

### ⭐⭐⭐⭐⭐ Review
*by D***. on 2 December 2025*

Great price for these quality spark plugs. My bike is running better!

## Frequently Bought Together

- NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/--
- K&N Motorcycle Oil Filter: High Performance, Premium, Designed to be used with Synthetic or Conventional Oils, Wrench Off Nut: Fits Select Suzuki Motorcycles, KN-138
- 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.sc/products/457717869-cr9eix-iridium-ix-spark-plug-4-pack](https://www.desertcart.sc/products/457717869-cr9eix-iridium-ix-spark-plug-4-pack)

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-21*