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.

I've had these for 2 years and I havnt had any problems after installing. Noticed a difference in performance and fuel economy

how do they work on a mustang 2012 v6 ?

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.

What size socket wrench does this fit? When measured, it fell between 9/16" and 10/16"

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.

Suggested torque for these in an aluminum cylinder head?

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

Product ID: 61038177

Details

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

⏳80,000-100,000 km durability

🔥0.6mm ultra-fine iridium tip

🛡️Superior anti-corrosion & anti-seizing

¥6941

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Description

⚡ Ignite your ride with NGK’s precision spark – where durability meets performance!

TRUSTED NGK QUALITY - Backed by a 4.7-star rating and engineered for high-tech, high-performance engines.
PRECISION IRIDIUM TIP - Ultra-fine 0.6mm electrode for maximum spark efficiency and engine responsiveness.
LONG LASTING PERFORMANCE - Rated for up to 100,000 km, ensuring fewer replacements and more road time.
CORROSION RESISTANT BUILD - Advanced anti-corrosion and anti-seizing properties protect your engine under all conditions.
UNIVERSAL FIT FOR MOTORCYCLES - Designed to fit a wide range of motorcycle engines, making upgrades effortless.

The NGK LTR6IX-11 Iridium IX Spark Plug features an ultra-fine 0.6mm iridium tip for superior ignition efficiency, rated for 80,000 to 100,000 km of reliable use. Its advanced anti-corrosion and anti-seizing properties ensure long-lasting durability, making it an ideal upgrade for high-performance motorcycle engines. Trusted globally and highly rated, this spark plug delivers consistent power and smoother engine operation.

Specifications

ASIN	B001RLXDYQ
Automotive Fit Type	Universal Fit
Brand	NGK
Brand Name	NGK
Compatible with Vehicle Type	Motorcycle
Core Material	Iridium
Core material	Iridium
Customer Reviews	4.7 out of 5 stars 118 Reviews
Global Trade Identification Number	00087295065099, 00087295165096
Item Weight	0.05 Kilograms
Manufacturer	NGK Spark Plugs
Manufacturer Part Number	LTR6IX-11
Model Number	6509
OEM Equivalent Part Number	LTR6IX-11
Thread Size	14mm x 1.25mm
Thread size	14mm x 1.25mm
Top Material Type	Metal
Top material type	Metal
UPC	087295165096 087295065099
Unit Count	1.0 count
Vehicle service type	Motorcycle

Reviews

W**N

Perfect fit for 2014 Ford focus

These spark plugs are rated form 80000 to 100000 km. The identical ,double the price, Laser Iridium LTR6B19 plugs have an additional platinum lower electrode to extend the max mileage to 160000 km. .

25.02.2020

A**Y

Great Replacement in 2009 Acadia

Have about 5,000 miles on them, so far completely uneventful. I replaced the stock platinum plugs with these after the engine started stuttering badly on steeper inclines around our house. Its apparent immediately that the car is much happier using these than what was in it to begin with. Didn't seem to increase gas mileage (I'd hoped they would) but running better is sure to be better for the life of the engine.

14.08.2015

S**S

NGK Spark Plugs Rock!!!

I put these in my 2012 Chevy Camaro V6. Install was a breeze and I could definitely tell the difference in engine idle, throttle response and power when driving. I would recommend to anyone who's looking to upgrade.

20.06.2015

D**R

Five Stars

Very good quality

21.02.2015

A**R

Great item

Put in my Roush, all good

6.08.2018

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¥6941

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

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1 month ago

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