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Your cart is empty.Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity. NGK offers the Quality, Reliability and Durability you'd expect from an OEM manufacturer. NGK is the world's largest supplier of OEM spark plugs. It is recommended to research applications on NGK s website prior to purchase to make sure this OEM part fits your vehicle, including engine, drivetrain and quantity needed.
Terri & chris
Reviewed in the United States on March 9, 2025
They are just like I thought they would be
Robert Draper
Reviewed in Canada on March 8, 2025
They seem okay just have to install them now
Wise shopper?
Reviewed in the United States on March 10, 2025
Works
Thomas
Reviewed in the United States on January 23, 2025
Excellent translation
michael
Reviewed in the United States on June 30, 2024
The media could not be loaded.
Tyler B
Reviewed in the United States on June 15, 2024
I am thoroughly impressed with the NGK 3951 Pack of 8 Motorcycle Copper Spark Plugs (TR55) for several compelling reasons.Firstly, NGK's reputation for quality precedes them, and these spark plugs live up to the brand's renowned standards. The copper core design ensures excellent conductivity and heat dissipation, which is crucial for maintaining optimal engine performance and longevity.Secondly, installation was a breeze. The plugs fit perfectly into my motorcycle's engine without any issues, thanks to NGK's precise manufacturing and adherence to OE specifications. This made the replacement process straightforward and hassle-free.Thirdly, performance-wise, these spark plugs have significantly improved my motorcycle's engine responsiveness and fuel efficiency. Whether I'm cruising on the highway or tackling challenging terrains, I've noticed smoother acceleration and consistent power delivery throughout the RPM range.Moreover, durability is another standout feature of these spark plugs. They have demonstrated exceptional longevity, holding up well under various riding conditions and environmental factors. This reliability gives me peace of mind knowing that my bike's ignition system is in top-notch condition.Lastly, the value for money is undeniable. With the NGK 3951 Pack of 8, I received a cost-effective solution that not only enhances performance but also offers long-term reliability and durability.In conclusion, if you're looking to optimize your motorcycle's engine performance with a set of spark plugs that deliver on all fronts—quality, performance, reliability, and value—look no further than the NGK 3951 Motorcycle Copper Spark Plugs (TR55). They have earned my highest recommendation without hesitation. Five stars!
Roy
Reviewed in Canada on December 29, 2024
Excellent! Improved performance! Improved fuel mileage! Car runs like a top with 300k on it!!!
jaceyon taylor
Reviewed in the United States on December 18, 2024
5***** Thanks great seller arrive on time
Frank
Reviewed in Canada on November 18, 2024
Installed these plugs in my Ford Explorer prior to a 12000 km trip. They performed well and are still doing their job after. Pre gapped and ready to install.
DW Miller
Reviewed in the United States on October 15, 2024
Got one side replaced and they work fine. Thought I had a fouled plug but it is looking like it is the fuel pressure regulator- but these plugs work great and are a great value.
i d mclelland
Reviewed in the United Kingdom on June 24, 2023
EASY PROCESS FROM PURCHASE TO DELIVERY
Hasen Alhazmi
Reviewed in Saudi Arabia on June 17, 2023
The best product, yes, this is what we are looking for, and the price is reasonable
TRINO
Reviewed in the United States on March 1, 2023
No issues
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