---
product_id: 58843717
title: "DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus"
brand: "denso"
price: "€ 38.95"
currency: EUR
in_stock: true
reviews_count: 5
category: "Denso"
url: https://www.desertcart.sk/products/58843717-denso-iridium-tt-spark-plug-iw20tt-twin-tip-the-powerful
store_origin: SK
region: Slovakia
---

# φ0.4 mm iridium center electrode Twin Tip design for max flame kernel 22 Nm tightening torque DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus

**Brand:** denso
**Price:** € 38.95
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your drive with precision and power — don’t settle for less!

## Quick Answers

- **What is this?** DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus by denso
- **How much does it cost?** € 38.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/58843717-denso-iridium-tt-spark-plug-iw20tt-twin-tip-the-powerful)

## 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

- • **Twin Tip Technology:** Double needle electrode accelerates flame development, unlocking maximum power and improved fuel efficiency.
- • **Laser-Welded Durability:** All-around laser welding ensures unmatched reliability even under the harshest driving conditions.
- • **Precision Ignition Power:** Ultra-fine 0.4 mm iridium tip reduces spark voltage for lightning-fast starts and peak engine performance.
- • **Electromagnetic Noise Shield:** Built-in monolithic resistor eliminates interference, protecting your vehicle’s sensitive electronics.
- • **Perfect Fit for Premium Rides:** Compatible with top brands like Mercedes-Benz, Porsche, Honda, and VW — because your engine deserves the best.

## Overview

The DENSO Iridium TT IW20TT spark plug features a cutting-edge twin tip design with a 0.4 mm iridium center electrode and 0.7 mm platinum ground electrode, laser-welded for superior durability. It delivers faster ignition, improved fuel economy, and enhanced engine power, while its built-in resistor prevents electromagnetic interference. Compatible with a wide range of premium vehicles, it’s engineered for professionals who demand peak performance and reliability.

## Description

Buy DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus at desertcart UK. Free delivery on eligible orders.

Review: Genuine Denso - Great spark plug, I checked these carefully on receipt to make sure they where genuine (as there are a lot of fakes about).
Review: After using Denso's iridium tt plugs in my truck and van and getting great results. I found a TT plug with the proper reach, thread and heat range for my GeneRac GP5500, Denso (4709) IW20TT Iridium TT. Really easy starting, very stable with varing loads. You will know you are using a TT plug the first instant the engine starts because it sounds slightly different.

## Features

- IW20TT | Twin Tip Plug | Tightneing Torque (Nm): 22 | 1 - Earthed Electrode | Diameter (mm): 14 | Thread Length (mm): 19
- The Finest Twin Tip plug with improved acceletation, fuel economy and longevity compared to single tip plugs. The quenching effect has been decreased by forming the electrode into a double needle shape. As a result, the flame kernel rapidly develops and the engine’s power is drawn out to its maximum potential. DENSO IRIDIUM TT spark plugs have a φ0.4 mm iridium alloy center electrode and a 0.7 mm needle-type platinum alloy ground electrode.
- The iridium tip is mounted with an “All-around Laser Welding” method that insures high reliability even under the most severe driving conditions.
- Using DENSO’s exclusive iridium alloy having a very high melting point, the tip of the center electrode can be shaped very thin and fine, reducing spark voltage requirements and greatly improving ignitability.
- All specification types include an embedded, highly reliable, monolithic resistor to eliminate electoromagnetic noise interference from all kinds of electronic devices.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00TPUA6I2 |
| Best Sellers Rank | 327,388 in Automotive ( See Top 100 in Automotive ) 1,231 in Car Spark Plugs |
| Brand | Denso |
| Customer Reviews | 5.0 5.0 out of 5 stars (11) |
| Date First Available | 28 Mar. 2015 |
| Item Weight | 65 g |
| Item model number | IW20TT |
| Manufacturer | DENSO Corporation |
| Manufacturer part number | IW20TT |
| Model | IW20TT |
| OEM Part Number | 0948200154, 101000002AE, 101000047AB, 1UD118110, 1UT118110 |
| Position | Centre |
| Product Dimensions | 8.5 x 2.5 x 2.5 cm; 65 g |

## Product Details

- **Brand:** Denso
- **Core material:** Iridium
- **Thread size:** 14mm
- **Top material type:** iridium
- **Vehicle service type:** Car, Van

## Images

![DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus - Image 1](https://m.media-amazon.com/images/I/812UZ3IkwJL.jpg)
![DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus - Image 2](https://m.media-amazon.com/images/I/61KYqBAf6EL.jpg)
![DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus - Image 3](https://m.media-amazon.com/images/I/61shxT8JYxL.jpg)
![DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus - Image 4](https://m.media-amazon.com/images/I/71SwrqSERhL.jpg)
![DENSO Iridium TT Spark Plug - IW20TT - Twin Tip - The Powerful Premium Quality Ultra-Efficient Replacement Plug Fits Fiat Mercedes-Benz Honda MG Nissan Porsche Renault Subaru VW Hyundai Daewoo Lotus - Image 5](https://m.media-amazon.com/images/I/61mlMQvCKzL.jpg)

## Questions & Answers

**Q: What is the heat range rating on this plug?**
A: Here is a comparable heat range chart: https://www.densoproducts.com/learning-center/article/225/heat-range-conversion-chart, obviously this is a 20 plug.

**Q: Are these denso (4709) iw20tt spark-plugs delivered "pre-gapped" to the customer?**
A: As in any spark plug (SP) user, you should always check the gap. The same SP could be used in different engines and/or applications. So, BE EXTRA CAREFUL GAPPING these SP because the center electrode is .040 in dia. Will snap off very easily. I put them in a vice with vg light and carefully gap to what I need. I use non-nickel anti-seize on the threads whether the heads are aluminum or CI. Torque to factory specs. Good luck

## Customer Reviews

### ⭐⭐⭐⭐⭐ Genuine Denso
*by D***R on 25 July 2025*

Great spark plug, I checked these carefully on receipt to make sure they where genuine (as there are a lot of fakes about).

### ⭐⭐⭐⭐⭐ Review
*by J***E on 25 December 2020*

After using Denso's iridium tt plugs in my truck and van and getting great results. I found a TT plug with the proper reach, thread and heat range for my GeneRac GP5500, Denso (4709) IW20TT Iridium TT. Really easy starting, very stable with varing loads. You will know you are using a TT plug the first instant the engine starts because it sounds slightly different.

### ⭐⭐⭐⭐⭐ Review
*by V***A on 18 August 2024*

Alles wie vom Verkäufer beschrieben und genau so wie erwartet und es mir vorgestellt habe. Beste Empfehlung!

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**Shop now:** [https://www.desertcart.sk/products/58843717-denso-iridium-tt-spark-plug-iw20tt-twin-tip-the-powerful](https://www.desertcart.sk/products/58843717-denso-iridium-tt-spark-plug-iw20tt-twin-tip-the-powerful)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-03*