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⚡ Ignite your drive with NGK Iridium IX – where precision meets power!
The NGK Iridium IX LTR6IX-11 spark plugs come in a convenient 4-pack, featuring a durable iridium core for superior ignition performance. Designed as direct replacements tailored to specific vehicle models, these plugs ensure easy installation and consistent engine efficiency. Trusted by thousands with a 4.6-star rating, they offer long-lasting reliability and come in original NGK packaging to guarantee authenticity.
| ASIN | B004359CD4 |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #61,698 in Automotive ( See Top 100 in Automotive ) #389 in Automotive Replacement Spark Plugs |
| Brand | NGK |
| Core Material | Iridium |
| Customer Reviews | 4.6 4.6 out of 5 stars (446) |
| Date First Available | September 15, 2010 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 7 ounces |
| Item model number | LTR6IX-11 |
| Manufacturer | NGK Spark Plug |
| Manufacturer Part Number | LTR6IX-11 |
| Model | 4 pack NGK Iridium IX 6509 Spark Plug |
| Position | Front, Rear |
| Product Dimensions | 3.94 x 3.94 x 0.91 inches |
| Thread Size | 14 millimeters |
| Top Material Type | Ceramic, Metal |
| UPC | 087295065099 |
| Vehicle Service Type | Car, Truck |
D**N
Consistant and good quality
All plugs worked and were gapped the same.
A**R
Great spark plugs
Arrived quickly and packaged extremely well. Works great and would recommend this seller.
B**C
Dependable
Use in our race car.very dependable
J**A
Great deal, decent performance, easy install!
These spark plugs were a great deal and they were a perfect replacement for my 2014 Ford Focus. I opted to change them out early at 44K miles to maximize MPG and performance. They came pre-gapped from the factory with the utmost of precision. The threads felt strong and firm while installing. In the past, some cheap plugs' threads have felt soft that tend to give when installing. Not these. Easy peasy installation. While unscientific, I picked up about 4 MPG (~10%) since replacing them. Since I installed them, I have had no issues and have even noticed a slightly smoother idle.
J**Y
Perfect Replacement for MX-5
Replaced the 19 year-old spark plugs in my Mazda MX-5. Experienced an intermittent check engine light and occasional acceleration hiccup, after install installation of these and new coils no more check engine light and smooth acceleration, even when the engine is cold.
J**R
right part
perfect fit
J**K
2018 F150 Coyote. Runs great.
Bought these to get iridium plugs back in my truck the factory changed to Platinum spec plugs for service intervals and they have a much shorter service life. Did them at 85K miles because I drive pretty hard and I found the factory recommended changing plugs at 65K if you tow a lot. I figured heavy right foot probably simulates some towing and the gap was out of spec already. Anyways, truck runs awesome, definitely idles and accelerates a smoother in traffic. Installed at the factory set .043” from NGK. Lots of people online freak out about it not being a .055” gap for the coyote. They run great. If anything they will burn to a .055” gap after a couple years of driving. But with these efficiently and performance results, I am very happy with these plugs in my 2018 F150 5.0 V8 Coyote
L**Y
as advertised..!!!!
EXACTLY WHAT I NEEDED
M**D
Best spark plug
R**M
These type of spark plugs are used on my Honda motorcycle, and my MX5 car. The prices are better than my local parts shop. They come with pre-set gaps, do not set them differently, they are fragile.
J**T
As expected and at a great price!!
L**R
Excellent
A**R
Item arrived as advertised and delivered on schedule.
Trustpilot
2 weeks ago
3 days ago