---
product_id: 14103950
title: "NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW"
brand: "ngk"
price: "฿7421"
currency: THB
in_stock: true
reviews_count: 13
category: "Ngk"
url: https://www.desertcart.co.th/products/14103950-ngk-6509-iridium-spark-plug-ltr6ix-11-6-pcsnew
store_origin: TH
region: Thailand
---

# Iridium core for superior spark Pack of 6 for long-lasting use Vehicle-specific 14mm thread fit NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW

**Brand:** ngk
**Price:** ฿7421
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW by ngk
- **How much does it cost?** ฿7421 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/14103950-ngk-6509-iridium-spark-plug-ltr6ix-11-6-pcsnew)

## 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

- • **Bulk Pack Advantage:** Six plugs per pack to keep your engine firing strong longer 📦
- • **Tailored Vehicle Fit:** Engineered with a 14mm thread size for perfect compatibility 🔧
- • **Precision Iridium Core:** Delivers unmatched ignition performance and durability ⚡
- • **Effortless Installation:** Designed for quick, hassle-free replacement to get you back on the road fast 🚗
- • **Trusted Brand Excellence:** NGK’s 4.7-star rated spark plugs power millions with reliability ⭐

## Overview

The NGK #6509 Iridium Spark Plug LTR6IX-11 comes in a convenient 6-pack, featuring a durable iridium core and a 14mm thread size tailored for vehicle-specific fit. Renowned for its outstanding ignition performance and reliability, this spark plug is a top choice among automotive professionals and enthusiasts alike, boasting a 4.7-star rating from over 2,400 reviews.

## Description

Sold in packs of 6.

Review: Quality of spark plug is a outstanding - These spark plugs are definitely functional and their performance is marvelous. Did not have any issues
Review: Awesome Plugs - Perfect plug for the job, Installed in 5.0 coyote. NGK best around

## Features

- Sold in packs of 6

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00J62NNAC |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #6,167 in Automotive ( See Top 100 in Automotive ) #17 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,437) |
| Date First Available | March 22, 2014 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10.6 ounces |
| Item model number | LTR6IX-11 |
| Manufacturer | NGK |
| Manufacturer Part Number | 6509 |
| Model | 6 pack NGK Iridium IX 6509 Spark Plug |
| Position | Center |
| Product Dimensions | 3.7 x 0.94 x 4.98 inches |
| Thread Size | 14mm |
| Top Material Type | Iridium |
| UPC | 087295065099 |
| 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

![NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW - Image 1](https://m.media-amazon.com/images/I/619zkWbYNZL.jpg)

## Questions & Answers

**Q: Are these genuine NGK plugs**
A: Yes they are. Put them in a 2012 Cadillac. Car is still running just fine.

**Q: Gap was .041, spark plug off my 2011 Mustang V6 were 0.050, why the difference?**
A: Most all plugs come new at around .038. they have to be gapped according to specs by the engine manufacturer. Worn plugs will have a wider gap due to deteriorated metal and heat.

**Q: Has anyone tried this on a lincoln mkx?**
A: must be applied by engine size not car model

**Q: Is it fit Volkswagen Tiguan 2.0 tsi**
A: NGK has multiple grades of plugs that may fit your vehicle.  
It is recommended to go to NGK site at   https://ngksparkplugs.com/en/part-finder    to verify the applications that will fit your vehicle.
This site will show you all of the available plugs to fit your vehicle and will also show you which grade plug is recommended for the best performance of your specific engine.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Quality of spark plug is a outstanding
*by M***Z on December 22, 2025*

These spark plugs are definitely functional and their performance is marvelous. Did not have any issues

### ⭐⭐⭐⭐⭐ Awesome Plugs
*by Z***H on January 2, 2026*

Perfect plug for the job, Installed in 5.0 coyote. NGK best around

### ⭐⭐⭐⭐⭐ 2014 Acadia started purring
*by D***3 on July 27, 2025*

Worked great in 2014 Acadia. After replacing the spark plugs and the gasket, the car purred and accelerated great. I can feel the difference. I watched a YouTube video about replacement and I was done in 90 minutes. I haven't changed the spark plugs since we got the car at 70K miles, and now it has 160k miles.

## Frequently Bought Together

- NGK # 6509 Iridium Spark Plug LTR6IX-11 - 6 PCSNEW
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**Shop now:** [https://www.desertcart.co.th/products/14103950-ngk-6509-iridium-spark-plug-ltr6ix-11-6-pcsnew](https://www.desertcart.co.th/products/14103950-ngk-6509-iridium-spark-plug-ltr6ix-11-6-pcsnew)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-04*