---
product_id: 10276277
title: "(6441) ZFR6FIX-11 Iridium IX Spark Plug, Pack of 1"
brand: "ngk"
price: "฿1376"
currency: THB
in_stock: true
reviews_count: 13
category: "Ngk"
url: https://www.desertcart.co.th/products/10276277-6441-zfr6fix-11-iridium-ix-spark-plug-pack-of-1
store_origin: TH
region: Thailand
---

# 50,000-100,000 Mile Longevity Fine Iridium Tip for Extreme Ignitability Superior Anti-Corrosion & Anti-Seizing (6441) ZFR6FIX-11 Iridium IX Spark Plug, Pack of 1

**Brand:** ngk
**Price:** ฿1376
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite Your Drive with NGK Iridium IX – Where Performance Meets Longevity!

## Quick Answers

- **What is this?** (6441) ZFR6FIX-11 Iridium IX Spark Plug, Pack of 1 by ngk
- **How much does it cost?** ฿1376 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/10276277-6441-zfr6fix-11-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

- • **Unmatched Durability:** Iridium alloy’s ultra-high melting point ensures your spark plug outlasts conventional copper and platinum alternatives.
- • **Trusted by Professionals:** Widely used in high-performance and everyday vehicles, NGK Iridium IX is the go-to choice for reliability and peace of mind.
- • **Long-Term Cost Efficiency:** Extended lifespan of up to 100,000 miles means fewer replacements and less labor—saving you time and money.
- • **Corrosion & Seize Resistant:** Built to resist corrosion and seizing, guaranteeing hassle-free installation and removal every time.
- • **Precision Ignition Performance:** Fine iridium tip delivers lightning-fast spark for improved throttle response and engine efficiency.

## Overview

The NGK (6441) ZFR6FIX-11 Iridium IX Spark Plug features a fine iridium tip for superior ignitability and durability, designed to last between 50,000 to 100,000 miles. Engineered with corrosion and abrasion-resistant materials, it ensures reliable performance and easy installation, making it a top choice for high-performance and everyday vehicles alike.

## Description

NGK Iridium IX Spark Plug is designed to offer extreme ignitability, improved throttle response . It is constructed from durable material that is corrosion and abrasion resistant. This Spark plug features a fine iridium tip that ensures high durability. It ensures longevity and can easily be installed.

Review: Spark plugs for 01 Dodge Ram 5.2 - The plugs were perfectly gapped out of the box..040. Fit and work as expected.
Review: Good plugs, will last a long time - These are the plugs I run in most of my automotive applications. I've never received a bad one. With BMW engines, they'll go 50-100,000 miles, easy. From a nit-picky standpoint, none of the NGK IX plugs I've run have ever had any kind of an issue. No dished-out crush washers, broken electrodes or anodes. I use anti-seize (some people will tell you to do this with NGK, some will tell you to avoid it) and torque to 25-27 foot-pounds; I've never had one back out or come loose, or stripped threads or otherwise hurt the block. These install easily with a standard magnetic spark plug socket. I don't see improved power or economy or any of that typical mumbo jumbo. What these plugs give you is the knowledge that you'll only have to replace them every 50,000-100,000 miles. Compared to copper or platinum, the extra couple bucks you pay per plug will pay itself back not only in the longer lifetime but in the labor you save by not having to replace them so frequently.

## 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 | B000COVMXI |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #173,926 in Automotive ( See Top 100 in Automotive ) #1,070 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.8 4.8 out of 5 stars (871) |
| Date First Available | April 9, 2007 |
| Global Trade Identification Number | 00087295164419 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.58 ounces |
| Item model number | ZFR6FIX-11 |
| Manufacturer | NGK |
| Manufacturer Part Number | ZFR6FIX-11 |
| Model | NGK Iridium IX 6441 Spark Plug |
| OEM Part Number | 1UNH18110, 5860031240, 9009870066, 99906910X9020, BY481ZFR6F |
| Position | Unknown |
| Product Dimensions | 4.35 x 2.24 x 2.08 inches |
| Thread Size | 14mm |
| Top Material Type | Iridium |
| UPC | 087295164419 |
| Vehicle Service Type | Car, Truck |

## Product Details

- **Brand:** NGK
- **Core Material:** Iridium
- **Thread Size:** 14mm
- **Top Material Type:** Iridium
- **Vehicle Service Type:** Car, Truck

## Images

![(6441) ZFR6FIX-11 Iridium IX Spark Plug, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/81lMBJ-5KgL.jpg)

## Questions & Answers

**Q: Will these Spark Plugs fit a 1996 Honda Civic? Thanks.**
A: To answer you need to know the model of the engine If this is D15, then go

**Q: What kind of spark plug adapter do I need to place these? Thanks.**
A: Why do you want an adapter? There is no spark plug adapter, unless the thread is damage then you will have to put an insert

**Q: Does this fit the mitsubishi engine 2.0 df7w (4j11)?**
A: I couldn't tell you off the top of my head but I suggest that you go down to your local auto parts dealer and give them the pertinent information.  They should be able to give you an answer.

**Q: I will not need a gap tool with these ? Pre-gapped for Honda Civic 2002?**
A: These spark plugs come pre-gapped from NGK at .043" (1.1mm).

## Customer Reviews

### ⭐⭐⭐⭐⭐ Spark plugs for 01 Dodge Ram 5.2
*by C***H on January 10, 2025*

The plugs were perfectly gapped out of the box..040. Fit and work as expected.

### ⭐⭐⭐⭐⭐ Good plugs, will last a long time
*by R***N on August 1, 2016*

These are the plugs I run in most of my automotive applications. I've never received a bad one. With BMW engines, they'll go 50-100,000 miles, easy. From a nit-picky standpoint, none of the NGK IX plugs I've run have ever had any kind of an issue. No dished-out crush washers, broken electrodes or anodes. I use anti-seize (some people will tell you to do this with NGK, some will tell you to avoid it) and torque to 25-27 foot-pounds; I've never had one back out or come loose, or stripped threads or otherwise hurt the block. These install easily with a standard magnetic spark plug socket. I don't see improved power or economy or any of that typical mumbo jumbo. What these plugs give you is the knowledge that you'll only have to replace them every 50,000-100,000 miles. Compared to copper or platinum, the extra couple bucks you pay per plug will pay itself back not only in the longer lifetime but in the labor you save by not having to replace them so frequently.

### ⭐⭐⭐⭐⭐ Recommend in preludes
*by E***G on March 16, 2025*

Best plugs for all h22a and most older hondas

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-03*