★★★★★ 5
Good
Good
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Reviewed in the United States on March 30, 2026
NGK Ruthenium HX Spark Plug Box of 4 (TR5AHX)
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
NGK Ruthenium HX Spark Plug Box of 4 (TR5AHX)NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE technology as a high ignitability plug; Ruthenium HX spark plugs come with patented, specialized OEM DFE and PSPE tip designs. NGK Ruthenium HX High Ignitability spark plugs provide a more complete
Quick Dispatch:
Your NGK Ruthenium HX Spark Plug Box of 4 (TR5AHX) orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your NGK Ruthenium HX Spark Plug Box of 4 (TR5AHX) ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.7 ★★★★★
Based on 1439 reviews
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Product Reviews
★★★★★ 5
Great replacement parts!
Perfect fit for my 2003 Mercury Salt Water 150 2 stroke engine. Everything I needed was in the box.” “Good quality parts and saved me a lot compared to OEM.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 6, 2025
★★★★★ 5
Great brand and value for the price
high quality parts, look just like OEM, packaged well, I like that a parts list is included so that contents can be verified.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2025
★★★★★ 5
OE Quality Part
Worked perfectly. Everything needed is there.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
10 out of 10
The must do service package. This is a "fits multiple" kit so youll have some extras. The kit also includes the lower unit gear oil seals, which is awesome. I always trust quicksilver to be durable and a great value for the money.
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Reviewed in the United States on February 23, 2026
