---
product_id: 12620812
title: "7164 Iridium IX Spark Plugs TR55IX (8 Pack)"
brand: "ngk"
price: "€ 79.48"
currency: EUR
in_stock: true
reviews_count: 13
category: "Ngk"
url: https://www.desertcart.ie/products/12620812-7164-iridium-ix-spark-plugs-tr55ix-8-pack
store_origin: IE
region: Ireland
---

# Long-lasting durability & performance Iridium core for max spark efficiency OEM-grade fit for perfect compatibility 7164 Iridium IX Spark Plugs TR55IX (8 Pack)

**Brand:** ngk
**Price:** € 79.48
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 7164 Iridium IX Spark Plugs TR55IX (8 Pack) by ngk
- **How much does it cost?** € 79.48 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/12620812-7164-iridium-ix-spark-plugs-tr55ix-8-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

- • **Longevity That Lasts:** Engineered to resist wear and corrosion, delivering months of trouble-free driving.
- • **OEM-Grade Reliability:** Trusted by manufacturers worldwide, ensuring seamless fit and consistent engine performance.
- • **Precision Iridium Core:** Experience superior ignition with ultra-fine iridium tips for enhanced combustion and fuel efficiency.
- • **Instant Performance Boost:** Say goodbye to misfires and hello to smoother acceleration from the first install.
- • **Complete 8-Pack Convenience:** Perfect for full engine tune-ups, ensuring every cylinder fires flawlessly.

## Overview

NGK 7164 Iridium IX Spark Plugs (8 Pack) combine OEM-quality iridium tips with durable construction to deliver reliable, long-lasting ignition performance. Designed for vehicle-specific fitment, these spark plugs improve engine efficiency, reduce misfires, and are trusted by professionals worldwide for superior combustion and fuel economy.

## Description

Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity. NGK offers the Quality, Reliability and Durability you'd expect from an OEM manufacturer. NGK is the world's largest supplier of OEM spark plugs. It is recommended to research applications on NGK s website prior to purchase to make sure this OEM part fits your vehicle, including engine, drivetrain and quantity needed.

Review: good product 5 stars - 6 months later , no issues , no problems
Review: Engine Performance Improves Instantly - Excellent, long lasting product. Misfires disappear, engine performance improves instantly.

## Features

- Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity.
- Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer
- NGK is the world's largest supplier of OEM spark plugs
- Research Applications Prior to Purchase To Make Sure This OEM Part Fits Your Vehicle, Including Engine, Drivetrain and Quantity Needed.
- This Listing is for 8 Spark Plugs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0033I4W6E |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #104,404 in Automotive ( See Top 100 in Automotive ) #674 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.8 4.8 out of 5 stars (669) |
| Date First Available | January 9, 2010 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 11.5 ounces |
| Item model number | 7164 |
| Manufacturer | NGK |
| Manufacturer Part Number | 7164 TR55IX |
| Model | 8 pack NGK Iridium IX 7164 Spark Plug |
| OEM Part Number | FORD%1315691 |
| Position | Front, Rear |
| Product Dimensions | 4.2 x 3.6 x 1.1 inches |
| Thread Size | 14mm |
| Top Material Type | Iridium |
| UPC | 087295071649 |
| 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

![7164 Iridium IX Spark Plugs TR55IX (8 Pack) - Image 1](https://m.media-amazon.com/images/I/71L9INo8EwL.jpg)

## Questions & Answers

**Q: Would these work good in a supercharged 04 mustang ?**
A: No. You need a smaller gap like .032 - .035 depending how much boost you got. These are gapped at .059 which would take too much bending to gap it down. NGK says not to change gap more than .008. NGK TR6ix would work better with preset gap at .039

**Q: The NGK TR55IX plugs do not fit a 2002 Tahoe, 5.3l flexfuel.  Must use the TR5IX. Too many places including parts stores are selling the wrong plug.**
A: I don’t know why you think the TR55IX won’t work, just a slightly cooler plug than the TR5IX. In a lot of climates, it would probably help more than hurt.

**Q: What is the gap preset on this plug?**
A: Hi, Set of 8 TR55IX NGK Iridium IX plugs

Gap:  1.5mm
Heat: "5"
Seat:  taper

NOTE: these are very similar to TR5IX, the difference is: TR5IX have 1.0mm gap and TR55IX have 1.5mm gap. They are the same heat rating, length, etc. 

NOT SUITABLE FOR Ford TS50 with alloy heads.

Hope this info will help you make a decision.

**Q: Are these "one piece" spark plugs unlike the three piece design that comes as oem 2005 f150 4.6l?**
A: I installed these plugs in a 2002 Mercury Mountaineer 4.6 liter and they were one piece....easy to install ...make sure you use anti seize compound on the threads...and gap them properly to specs...the motorcraft plugs are prone for breaking off inside the vehicles because they get too hot and become brittle after awhile...and most people dont change them every 40-50,000 miles...definetely recommend the NGK's

## Customer Reviews

### ⭐⭐⭐⭐⭐ good product 5 stars
*by B***R on January 7, 2026*

6 months later , no issues , no problems

### ⭐⭐⭐⭐⭐ Engine Performance Improves Instantly
*by A***A on September 6, 2025*

Excellent, long lasting product. Misfires disappear, engine performance improves instantly.

### ⭐⭐⭐⭐⭐ NGK iridium spark plugs
*by J***G on July 29, 2025*

Very good spark plugs for the money. You can't beat NGK for quality.

## Frequently Bought Together

- NGK 7164 Iridium IX Spark Plugs TR55IX (8 Pack)
- ACDelco Professional 9718Q Spark Plug Wire Set
- ACDelco GM Original Equipment D329A Ignition Distributor Cap , Black

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-03*