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2009-2014 F150 Performance Parts
2011-2014 F-150 5.0L Performance Parts & Accessories
Engine Parts
Spark Plugs & Coils
11-17 F150 5.0L NGK 6509 Iridium IX Spark Plugs
2011-2017 F150 5.0L V8 NGK 6509 Iridium IX Spark Plugs (Set of 8) LTR6IX-11
11-17 F150 5.0L NGK 6509 Iridium IX Spark Plugs
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Part#:
6509-LTR6IX-11-5.0l
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Improved Spark with Higher Corrosion and Fouling Resistance
Maximizing the performance of your truck's 5.0L Coyote V8 engine means you'll need spark plugs that are up to the job. NGK is one of the top names in the aftermarket spark plug world and their Iridium IX series are some of the best-performing and most reliable spark plugs on the market. Each of these plugs are built to last, resisting corrosion all while delivering a clean, powerful spark for your truck's engine. The NGK Iridium IX spark plugs are an excellent choice for replacing OEM spark plugs and getting improve performance for your 2011 to 2017 F150 5.0L with a factory heat range.
High-Quality Iridium Tip and Corrosion-Resistant Design
The NGK Iridium IX spark plugs are named after their .6 mm laser-welded iridium tip that delivers a powerful arc while being highly resistant to corrosion and fouling. The insulator and electrode feature Trivalent metal plating that offers up vastly improved anti-seizure and anti-corrosion properties than traditional spark plugs. These plugs have a tapered electrode that reduces quenching while making regapping extremely simple.
Spark Plug Specifications:
Thread Size:
14mm
Heat Range:
8
Wrench Diameter:
5/8"
Would you recommend these or the 6510 plugs for a 5.0 with 5star 87 perf/tow tune?
Asked by:
Matt
- 6/4/2017
These plugs will be fine for a tune alone. The 6510s are more for supercharger, full bolt-ons with water-meth, nitrous-injected, or turbocharged 5.0L F150s that benefit more from the colder heat range.
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Answer provided by:
Jason@Stage3 (6/5/2017)
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NGK #6509 come pregapped @ .041. What do they need to be in a bolt on 13' Mustang GT?
Asked by:
5ooohhh
- 6/24/2017
It really depends on what tuning your using, and your best bet would be to talk to your custom tuner of choice to see what they recommend. In general, the most common recommendations are usually around the .045" range for a tuned Mustang. If your Mustang isn't tuned, then you can stick to the OEM ranges of .049-.053". That being said, if you are going to tune your Mustang in the future, you probably want to gap tighter now, rather than having to re-gap later.
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Answer provided by:
Jason@Stage3 (6/26/2017)
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Are these pre-gapped properly for a 2014 F150 5.0 V8? Simple bolt-ons, intake and exhaust installed.
Asked by:
JoMag
- 9/11/2021
These plugs come gapped at roughly .043" out of the box. In your case, on a stock tune, you'd probably need to widen that gap to .049"-ish. If you're planning on using an aftermarket tune in the near future, you can use the out-of-the-box gap up to roughly .045".
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Answer provided by:
Jason@Stage3 (9/13/2021)
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