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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NGK Spark Plug, NGK Iridium IX, 14 mm Thread, 0.984 in Reach, Tapered Seat, Stock Number 6509, Resistor, Each

Product ID: 81919183

Details

Brand
NGK
Core Material
Iridium
Thread Size
14mm x 1.25mm
Top Material Type
Metal
Vehicle Service Type
Motorcycle

🔥Iridium tip for max durability

⚙️14 mm precision thread

🛡️Superior anti-corrosion & anti-seizing

5.84 OMR

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Description

🔥 Ignite your ride with NGK Iridium IX – where precision meets power!

BUILT TO LAST - Constructed from premium materials with a high melting point iridium alloy designed for today’s demanding engines.
IRIDIUM IX TECHNOLOGY - Fine iridium tip delivers exceptional durability and consistent spark for reliable ignition every time.
TRUSTED BY PROFESSIONALS - NGK’s industry-leading quality and reliability make this spark plug a must-have for serious riders who demand the best.
CORROSION SEIZE RESISTANT - Advanced anti-corrosion and anti-seizing properties keep your spark plug performing flawlessly under extreme conditions.
PRECISION FIT FOR PEAK PERFORMANCE - 14 mm thread and 0.984 in reach ensure perfect compatibility with your high-performance motorcycle engine.

The NGK Iridium IX spark plug features a 14 mm thread and 0.984 inch reach with a tapered seat, engineered for motorcycle engines. Its fine iridium tip offers superior durability and a high melting point, ensuring reliable ignition and long-lasting performance. Enhanced with anti-corrosion and anti-seizing properties, this spark plug is designed to withstand harsh conditions, making it a top choice for high-performance and professional riders.

Specifications

ASIN	B001RLXDYQ
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#396,030 in Automotive ( See Top 100 in Automotive ) #59 in Automotive Performance Spark Plugs #2,182 in Automotive Replacement Spark Plugs
Brand	NGK
Brand Name	NGK
Compatible with Vehicle Type	Motorcycle
Core Material	Iridium
Customer Reviews	4.6 out of 5 stars 125 Reviews
Global Trade Identification Number	00087295065099, 00087295165096
Included Components	Per Item Description
Item Weight	0.05 Kilograms
Manufacturer	Auto Extra
Manufacturer Part Number	LTR6IX-11
Manufacturer Warranty Description	30 Days
Model Number	6509
OEM Equivalent Part Number	LTR6IX-11
Thread Size	14mm x 1.25mm
Top Material Type	Metal
UPC	087295165096 087295065099
Unit Count	1.0 Count
Vehicle Service Type	Motorcycle

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5.84 OMR

Duties & taxes included

In stock

Sold byAmazon OMANDelivered 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 OMAN.

Secure transaction

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Join PRO →

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TrustScore 4.5 | 7,300+ reviews

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Very impressed with the quality and fast delivery. Will shop here again.

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