---
product_id: 261588359
title: "8 New Iridium IX Spark Plugs TR55IX # 7164"
brand: "ngk"
price: "¥21523"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/261588359-8-new-iridium-ix-spark-plugs-tr55ix-7164
store_origin: JP
region: Japan
---

# Long-lasting durability Iridium IX for superior ignition OEM-grade precision fit 8 New Iridium IX Spark Plugs TR55IX # 7164

**Brand:** ngk
**Price:** ¥21523
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with NGK’s iridium edge!

## Quick Answers

- **What is this?** 8 New Iridium IX Spark Plugs TR55IX # 7164 by ngk
- **How much does it cost?** ¥21523 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/261588359-8-new-iridium-ix-spark-plugs-tr55ix-7164)

## 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:** Engineered for longevity, these plugs reduce replacements and keep your ride smooth.
- • **Fit with Confidence:** Research-backed fitment guarantees seamless integration with your vehicle’s engine and drivetrain.
- • **OEM Trusted Quality:** World’s largest OEM spark plug supplier ensures perfect compatibility and reliability.
- • **Precision Ignition Power:** Iridium IX technology delivers unmatched spark efficiency for peak engine performance.
- • **Complete Set for Convenience:** Includes 8 plugs, covering front and rear positions for a full engine refresh.

## Overview

NGK’s 8-pack Iridium IX spark plugs (model 7164 TR55IX) combine OEM-level quality and durability with advanced iridium technology, ensuring superior ignition performance and long-lasting reliability. Designed for precise fitment across engine and drivetrain components, these plugs are the trusted choice for professional-grade vehicle maintenance.

## 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.

## Features

- Often specified as origil equipment, NGK spark plugs are the best combition 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 Quany Needed.
- This Listing is for 8 Spark Plugs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | NGK |
| Brand | NGK |
| Product Dimensions | 10.67 x 9.14 x 2.79 cm; 326.59 g |
| Item model number | 7164 |
| Manufacturer Part Number | 7164 TR55IX |
| OEM Part Number | FORD%1315691 |
| Position | Front, Rear |
| Item Weight | 327 g |

## Product Details

- **Brand:** NGK
- **Core material:** Iridium
- **Thread size:** 14mm
- **Top material type:** Iridium
- **Vehicle service type:** Car

## Images

![8 New Iridium IX Spark Plugs TR55IX # 7164 - 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

## 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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**Shop now:** [https://www.desertcart.jp/products/261588359-8-new-iridium-ix-spark-plugs-tr55ix-7164](https://www.desertcart.jp/products/261588359-8-new-iridium-ix-spark-plugs-tr55ix-7164)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-03*