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⚡ Ignite your ride with NGK’s iridium power—because every spark counts!
The NGK LTR6IX-11 6509 is a genuine 8-pack of iridium spark plugs designed specifically for motorcycles. Featuring a durable iridium core and 14mm thread size, these plugs deliver enhanced ignition performance and improved fuel efficiency. Trusted by professionals and backed by a 4.8-star rating, this pack ensures a full engine refresh with authentic NGK quality and easy installation.
| ASIN | B07PJ52HYJ |
| Automotive Fit Type | Vehicle Specific Fit |
| Brand Name | NGK |
| Compatible with Vehicle Type | Motorcycle |
| Core Material | Iridium |
| Customer Reviews | 4.8 4.8 out of 5 stars (97) |
| Included Components | 6509 |
| Item Weight | 0.88 Pounds |
| Manufacturer | NGK |
| Manufacturer Part Number | 6509 |
| Model Number | 6509 |
| Thread Size | 14mm |
| Top Material Type | Nickel |
| UPC | 087295180334 |
| Unit Count | 8.0 Count |
R**I
Working well so far. Product was packaged nicely and authentically from NGK. Plugs feel sturdy, and fit in socket and were installed and torqued easily. Plugs will need to be gapped manually with a gauge.
R**M
These plugs are the best! I should’ve replaced them sooner. Went from 12mpg to 18mpg!
C**S
Cheap alternative to taking it to the shop they work fine.
A**R
Finally, an Iridium plug to replace the OEM Motorcraft plug that came with my 2012 F-150 5.0. For a while you couldn't get Iridium for my truck. I tried Platinum - The performance and gas mileage was horrible. Then I tried a new NGK called Ruthenium HX - Better than Platinum but not as good as the Iridium. But now, Finally, NGK came through with an Iridium plug for the 2012 F-150 5.0, and they are as good as OEM. I was averaging 14.8... in town and lucky to get 17 -18 on the highway. Now with the new iridium,.. 16.5 in town and 20-21 on the highway. I gap mine at .049 for a hotter spark. The gap range is .049-.053. Worth every penny.
S**N
The plugs needed to be gapped prior to installation but after installation the truck ran great.
Trustpilot
2 days ago
3 weeks ago