---
product_id: 11867933
title: "(5304) IK20 Iridium Power Spark Plug, (Pack of 1)"
brand: "denso"
price: "₩20785"
currency: KRW
in_stock: true
reviews_count: 11
url: https://www.desertcart.kr/products/11867933-5304-ik20-iridium-power-spark-plug-pack-of-1
store_origin: KR
region: South Korea
---

# 0.4mm iridium electrode - max spark power U-groove & taper cut electrode - faster flame growth 360° laser welding - unmatched durability (5304) IK20 Iridium Power Spark Plug, (Pack of 1)

**Brand:** denso
**Price:** ₩20785
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with precision power and unstoppable performance!

## Quick Answers

- **What is this?** (5304) IK20 Iridium Power Spark Plug, (Pack of 1) by denso
- **How much does it cost?** ₩20785 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/11867933-5304-ik20-iridium-power-spark-plug-pack-of-1)

## Best For

- denso enthusiasts

## Why This Product

- Trusted denso brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Unbreakable Bond:** DENSO’s patented 360-degree laser welding guarantees exceptional structural strength and long-lasting reliability.
- • **Trusted OEM Quality:** OE fit for Subaru and other vehicles, backed by thousands of 5-star reviews—join the elite drivers who never settle.
- • **Rapid Flame Acceleration:** Innovative U-groove and taper cut ground electrode ensures faster spark flame growth, boosting combustion efficiency.
- • **Fuel Economy Game-Changer:** Experience noticeable improvements in gas mileage and power—upgrade your ride and leave inefficiency behind.
- • **Precision Ignition Mastery:** World’s smallest 0.4mm iridium center electrode delivers peak firing potential for superior engine performance.

## Overview

The Denso IK20 Iridium Power Spark Plug features a razor-thin 0.4mm iridium electrode for maximum spark efficiency, enhanced by a U-groove and taper cut ground electrode that accelerates flame growth. Its patented 360-degree laser welding ensures unmatched durability and reliability. Designed as an OEM replacement for select vehicles, it delivers improved engine power, better fuel economy, and long-lasting performance, making it a top choice for discerning drivers seeking a premium ignition upgrade.

## Description

Denso (5304) IK20 Iridium Power Spark Plug, (Pack of 1)

Review: Excellent quality - OE for Subarus, good price.
Review: I will NEVER go back to regular carbon plugs again. - After a 160k miles, my Toyota Tundra began to misfire due to cracked over-the-plug ignition coils that needed replacement. So just to be certain to fix the misfiring, I thought it would be best to replace the spark plugs too. I looked around online for iridium spark plugs and found these to be the least expensive anywhere. I have always bought the cheap carbon electrode type before I read up on the Iridium plugs and decided to make the spurge and pay the extra money for this spark plug upgrade. I am so glad I did! After replacing the ignition coils and upgrading the spark plugs to these Iridium plugs, I noticed that not only has the misfiring been cured but I now have even more power and better gas mileage than ever before! I am convinced it is because I upgraded the spark plugs to iridium plugs. Yes, they may be much more expensive than you have spent on spark plugs in the past but I am telling you it is worth it. I will NEVER go back to regular carbon plugs again after experiencing the power increase and mileage gains these Iridium plugs provide. I can't recommend these plugs highly enough to anyone to needs new spark plugs in their Tundra. And when desertcart put these plugs on sale, this was the lowest price I found anywhere else online. In any case, purchasing these OEM over-the-plug ignition coils here SAVED ME A LOT OF MONEY.

## Features

- 0.4 mm iridium center electrode: world's smallest diameter that maximizes firing potential
- U-groove and taper cut ground electrode: provides faster spark flame growth and lessens heat quenching
- DENSO patented 360 degree laser welding process: ensuring exceptional quality bond and structural strength with the iridium center electrode

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000M6UR82 |
| Automotive Fit Type | Vehicle Specific Fit |
| Batteries | Lithium Metal batteries required. |
| Best Sellers Rank | #98,040 in Automotive ( See Top 100 in Automotive ) #19 in Automotive Performance Spark Plugs |
| Brand | Denso |
| Core Material | Iridium |
| Customer Reviews | 4.4 4.4 out of 5 stars (543) |
| Date First Available | September 20, 2007 |
| Exterior | Machined |
| Global Trade Identification Number | 00042511053045 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.44 ounces |
| Item model number | IK20 |
| Manufacturer | Denso |
| Manufacturer Part Number | IK20 |
| Model | Spark Plug |
| OEM Part Number | DENS7 |
| Position | Center |
| Thread Size | RM |
| Top Material Type | Iridium |
| UPC | 042511053045 |
| Vehicle Service Type | Car |

## Product Details

- **Brand:** Denso
- **Core Material:** Iridium
- **Thread Size:** RM
- **Top Material Type:** Iridium
- **Vehicle Service Type:** Car

## Images

![(5304) IK20 Iridium Power Spark Plug, (Pack of 1) - Image 1](https://m.media-amazon.com/images/I/71DQ8Ouw2cL.jpg)

## Questions & Answers

**Q: are these pregapped for the 07 gti or what is the gap they come as?**
A: I believe they are all pre gapped. Read the info on the page.

**Q: Denso (5304) ik20 iridium power spark plug; will these fit 2000 lexus es300 ?**
A: According to the information provided, this is the correct spark plug.

**Q: Does this fit 2002 BMW 525i ?**
A: Use the guide at the top of the page.

**Q: Does this fit a 2000 vw jetta 1.8t**
A: I don't think this plugs will fit your VW, they are for the Honda K engine. You could use the car filter to narrow down the plug for you car.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent quality
*by T***E on December 24, 2025*

OE for Subarus, good price.

### ⭐⭐⭐⭐⭐ I will NEVER go back to regular carbon plugs again.
*by W***R on August 4, 2017*

After a 160k miles, my Toyota Tundra began to misfire due to cracked over-the-plug ignition coils that needed replacement. So just to be certain to fix the misfiring, I thought it would be best to replace the spark plugs too. I looked around online for iridium spark plugs and found these to be the least expensive anywhere. I have always bought the cheap carbon electrode type before I read up on the Iridium plugs and decided to make the spurge and pay the extra money for this spark plug upgrade. I am so glad I did! After replacing the ignition coils and upgrading the spark plugs to these Iridium plugs, I noticed that not only has the misfiring been cured but I now have even more power and better gas mileage than ever before! I am convinced it is because I upgraded the spark plugs to iridium plugs. Yes, they may be much more expensive than you have spent on spark plugs in the past but I am telling you it is worth it. I will NEVER go back to regular carbon plugs again after experiencing the power increase and mileage gains these Iridium plugs provide. I can't recommend these plugs highly enough to anyone to needs new spark plugs in their Tundra. And when Amazon put these plugs on sale, this was the lowest price I found anywhere else online. In any case, purchasing these OEM over-the-plug ignition coils here SAVED ME A LOT OF MONEY.

### ⭐⭐⭐⭐⭐ Excellent
*by R***S on June 1, 2009*

Picked up a set of these to replace the stock NKGs on my 2005 Honda Accord 4 cylinder after 97k miles. The originals were still good -- just doing a spring-time overhaul. Engine felt smoother although that could be psychological. What is real, however, is a solid and consistent 2 MPG increase in fuel economy from what I was averaging over the last 60k miles. I'll try to update this review after 30k miles or so. Update 3/25/14: Just received and installed my 2nd set - went another 100k miles this past 5 years. The Denso plugs were still good and in excellent physical condition - just a spring overhaul again. I also wanted to note that I use these plugs on my wife's 2003 Honda CRV. Solid no-worry product.

## Frequently Bought Together

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-18*