Are these genuine NGK plugs

Yes they are. Put them in a 2012 Cadillac. Car is still running just fine.

Gap was .041, spark plug off my 2011 Mustang V6 were 0.050, why the difference?

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.

Has anyone tried this on a lincoln mkx?

must be applied by engine size not car model

Is it fit Volkswagen Tiguan 2.0 tsi

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.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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NGK #6509 イリジウムスパークプラグ LFR6AIX-11 6個入り

Product ID: 733315989

Details

Brand
NGK
Core Material
Iridium
Thread Size
14mm
Top Material Type
Iridium
Vehicle Service Type
Car Truck

⚡Iridium core for max spark efficiency

🔥6-pack ensures full engine upgrade

🔧Pre-gapped 14mm thread for easy install

Description

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

COMPLETE ENGINE REFRESH - 6-pack set covers all cylinders for consistent, reliable ignition across your vehicle.
PLUG AND PLAY CONVENIENCE - Pre-gapped spark plugs save you time and hassle—just install and ignite your ride.
RACE PROVEN IRIDIUM POWER - Experience peak engine performance with NGK’s advanced iridium technology trusted by pros.
GLOBAL ENTHUSIAST FAVORITE - Join thousands of satisfied drivers worldwide who trust NGK for superior quality and durability.
OPTIMIZED FOR CARS TRUCKS - Versatile compatibility ensures your vehicle runs smoother, whether daily commute or weekend thrill.

NGK #6509 Iridium IX Spark Plugs come in a 6-piece set featuring a durable iridium core and pre-gapped 14mm threads for easy installation. Renowned globally among automotive enthusiasts and professionals, these plugs maximize engine power and efficiency for cars and trucks, delivering reliable performance and long-lasting durability.

Specifications

ASIN	B00J62NNAC
Brand	NGK
Brand Name	NGK
Compatible with Vehicle Type	Car, Truck
Core Material	Iridium
Customer Reviews	4.7 out of 5 stars 2,352 Your Review
Item Weight	299 g
Manufacturer	NGK
Manufacturer Part Number	6509
Thread Size	14mm
Top Material Type	Iridium
UPC	087295065099
Unit Count	6.00 本
Vehicle Service Type	Car, Truck

Reviews

J**N

They work great

Great quality spark plugs. Just fitted them to my 2014 3.7 V6 Mustang. Runs fine with no issues. No need to gap them as they're per gaped. Bought via a US seller and arrived in the UK very quickly.

17.03.2022

N**.

Bujias

Funcionaron muy bien.

10.10.2025

M**Z

Quality of spark plug is a outstanding

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

22.12.2025

D**E

Parfait

Super mon moteur tourne maintenant sur tout ses cylindres

23.12.2025

Z**H

Awesome Plugs

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

2.01.2026

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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NGK #6509 イリジウム スパークプラグ LFR6AIX-11 6個入り

Details

Details

Description

Specifications

Reviews

Common Questions

NGK #6509 イリジウムスパークプラグ LFR6AIX-11 6個入り