---
product_id: 61038177
title: "NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1"
brand: "ngk"
price: "€ 48.18"
currency: EUR
in_stock: true
url: https://www.desertcart.es/products/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-1
store_origin: ES
region: Spain
---

# Iridium tip for max durability High melting point alloy for high-tech engines Superior anti-corrosion & anti-seizing NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1

**Brand:** ngk
**Price:** € 48.18
**Availability:** ✅ In Stock

## Summary

> ⚡ Ignite your ride with NGK’s iridium edge – where durability meets high performance!

## Quick Answers

- **What is this?** NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 by ngk
- **How much does it cost?** € 48.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-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 Longevity:** Fine iridium tip engineered to outlast standard plugs, keeping your engine firing flawlessly.
- • **Precision Performance:** Iridium alloy withstands extreme heat, perfect for modern high-performance engines demanding reliability.
- • **Lightweight Efficiency:** At just 45g, it delivers power without adding bulk, optimizing engine responsiveness.
- • **Global Quality Assurance:** Internationally sourced with strict quality standards, designed to meet diverse engine specifications worldwide.
- • **Corrosion-Resistant Armor:** Built with superior anti-corrosion and anti-seizing properties to ensure hassle-free maintenance.

## Overview

The NGK LTR6IX-11 Iridium IX Spark Plug features a fine iridium tip for exceptional durability, superior anti-corrosion and anti-seizing properties, and an iridium alloy with a high melting point designed for modern high-performance engines. Lightweight and precision-engineered, it ensures reliable ignition and long-lasting performance across global engine standards.

## Description

NGK(6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1

## Features

- Made 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
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | NGK Spark Plugs |
| Brand | NGK |
| Product Dimensions | 95 x 25 x 21 cm; 45 g |
| Item model number | LTR6IX-11 |
| Manufacturer part number | LTR6IX-11 |
| OEM Part Number | LTR6IX-11 |
| Position | Unknown |
| Item Weight | 45 g |

## Product Details

- **Brand:** NGK
- **Core material:** Iridium
- **Thread size:** 14mm x 1.25mm
- **Top material type:** Metal
- **Vehicle service type:** Motorcycle

## Images

![NGK (6509) LTR6IX-11 Iridium IX Spark Plug, Pack of 1 - Image 1](https://m.media-amazon.com/images/I/61DjMfbmYQL.jpg)

## Questions & Answers

**Q: Has anyone had these for a while and did you have any problems since installing them? I have a GM 3.6 with COP and want to replace stock plugs.**
A: I've had these for 2 years and I havnt had any problems after installing. Noticed a difference in performance and fuel economy

**Q: how do they work on a mustang 2012 v6 ?**
A: Thank you for inquiry. Yes, this will work on 2012 Ford Mustang V6. Don't hesitate to contact us if we may further assist you.

**Q: What size socket wrench does this fit? When measured, it fell between 9/16" and 10/16"**
A: There is no such thing as a 10/16" socket. I0/16" is 5/8". I use a 5/8" spark plug socket which has a rubber insert so the plug stays in the socket when taking out and installing.  Saves a lot of trouble. Socket wrench is what you install the socket or extensions on which you will need.

**Q: Suggested torque for these in an aluminum cylinder head?**
A: According to NGK, it depends on the plug's diameter:
 18 mm	35 to 40N·m (3.5 to 4.0 kgm)
14 mm	25 to 30N·m (2.5 to 3.0 kgm)
12 mm	15 to 20N·m (1.5 to 2.0 kgm)
10 mm	10 to 12N·m (1.0 to 1.2 kgm)
8 mm	8 to 10N·m (0.8 to 1.0 kgm)

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**Shop now:** [https://www.desertcart.es/products/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-1](https://www.desertcart.es/products/61038177-ngk-6509-ltr6ix-11-iridium-ix-spark-plug-pack-1)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-01-27*