Ate these counterfeit??

These spark plugs probably ARE counterfeits (very good fakes). I purchased another set from a national autoparts retailer and NGK dealer to compare against. They are almost identical with the exception of two key differences: 1. One of the individual box panels of the Amazon spark plugs reads "Assembled in Thailand." The box of the legit ones from the brick-and-mortar store reads "Made in Japan." 2. The spark plugs from Amazon are embossed "NGK" on the metal collar right above the washer. The embossing on the ones from the brick-and-mortar store reads "Japan." Do yourself a favor and purchase quality spark plugs from a legitimate source. By doing so you'll have the assurance you are installing parts that will perform (100K miles for real NGK spark plugs) and won't damage your vehicle.

Are they already gap?

Yes, iridium plugs are gapped at the factory due to the high potential of scratching the tips when trying to gauge the gaps. If you do want to double check the gaps prior to installation, don't use the coin measuring tool, but one that won't put pressure on the iridium tips.

This is original Ngk ?

Mine appeared to be after watching several videos on counterfeits. Then just to be sure, I called NGK USA customer service and gave them the plug number and lot number. They confirmed the lot number was valid. (This was all last year.) The NGK person asked me where I had purchased them and i told him Amazon. He stated that there were currently (again this was 2020) significant counterfeit issues on ebay purchased NGK Iridium plugs minimal issues on Amazon. Safest bet IMHO is to buy them from an auto parts retailer.

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Description

⚡ Ignite your drive with NGK’s cutting-edge spark plugs — where precision meets power!

INNOVATIVE INSULATOR DESIGN - Longer nose and corrugated ribs prevent carbon buildup and flashover, maximizing reliability.
PERFORMANCE DRIVEN FUEL EFFICIENCY - Get faster starts and quicker acceleration while reducing fuel consumption and emissions.
PRECISION LASER WELDED IRIDIUM TIP - Experience unmatched durability and a powerful spark that keeps your engine firing flawlessly.
ADVANCED PLATINUM DISC GROUND ELECTRODE - Engineered for extended lifespan, ensuring your ride stays smooth mile after mile.
CORROSION RESISTANT TRIVALENT METAL PLATING - Stay worry-free with superior anti-corrosion and anti-seizing protection for long-term performance.

The NGK ILZKR7B-11S Laser Iridium Spark Plug set features laser-welded iridium tips and platinum ground electrodes for exceptional durability and performance. Designed with a longer insulator nose and triple gasket seal, these plugs prevent carbonization and combustion gas leaks, delivering faster starts, improved fuel economy, and lower emissions. Ideal for a wide range of vehicles, they combine advanced materials and engineering to keep your engine running like new.

Specifications

ASIN	B01DMFGRZG
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#69,009 in Automotive ( See Top 100 in Automotive ) #502 in Automotive Replacement Spark Plugs
Brand	NGK
Brand Name	NGK
Compatible with Vehicle Type	Watercraft, all-terrain-vehicles, off-road-motorcycles, snowmobiles, street-cruiser-motorcycles, street-motor-scooters, street-sport-motorcycles, street-touring-motorcycles
Core Material	Iridium
Customer Reviews	4.5 out of 5 stars 1,053 Reviews
Global Trade Identification Number	00087295057872
Included Components	NGK (5787-4PK) ILZKR7B-11S Laser Iridium Spark Plug, Box of 4
Item Type Name	ILZKR7B-11S Laser Iridium Spark Plug, Box of 4
Item Weight	0.4 Pounds
Manufacturer	NGK
Manufacturer Part Number	5787-4PK
Manufacturer Warranty Description	Manufacturer
Model Number	5787-4PK
OEM Equivalent Part Number	5787-4PK
Thread Size	14mm x 1.25mm
Top Material Type	Metal
UPC	087295057872 603996526402 087295457733
Unit Count	4.0 Count
Vehicle Service Type	Watercraft, all-terrain-vehicles, off-road-motorcycles, snowmobiles, street-cruiser-motorcycles, street-motor-scooters, street-sport-motorcycles, street-touring-motorcycles Vehicle Service Type Watercraft, all-terrain-vehicles, off-road-motorcycles, snowmobiles, street-cruiser-motorcycles, street-motor-scooters, street-sport-motorcycles, street-touring-motorcycles See more

Reviews

M**N

14.03.2026

C**O

13.04.2026

M**R

25.03.2026

M**R

14.04.2026

D**S

13.04.2026

H**T

19.09.2023

J**O

12.01.2026

J**R

14.02.2025

I**Z

26.11.2025

R**N

4.03.2026

J**É

19.03.2026

J**A

20.06.2025

V**E

22.04.2026

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NGK (5787-4PK) ILZKR7B-11S Laser Iridium Spark Plug, Box of 4

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