2011-2017 F150 5.0L V8 NGK 6510 Iridium IX Spark Plugs (Set of 8) LTR7IX-11

11-17 F150 5.0L NGK 6510 Iridium IX Spark Plugs

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Part#:

6510-LTR7IX-11-5.0l

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Product Features
8 Q&A(s)

Highlights:

Improved Design for Reliability
Perfect for Modified and Tuned Trucks
Full Set of Eight (8) Spark Plugs

Improved Spark with One Step Colder Heat Range than Stock

When you throw an aggressive tune and a wide range of F150 5.0L Performance parts, like superchargers, at your very own 5.0L Coyote V8, you'll need a few bits of fine tuning to get your motor running at its best. These NGK Iridium IX spark plugs are a nice upgrade that have a one step lower heat range than OEM for heavily modified and tuned trucks that still feature NGK's legendary reliability and performance. The Iridium IX plugs are built from the ground up to resist corrosion and fouling while providing improved spark, reliability, and versatility over your truck's factory spark plugs. This full set of eight iridium spark plugs from NGK are an excellent choice for tuned vehicles that have wore out the welcome of the factory plugs.

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: 7
Wrench Diameter: 5/8"

I have a 2013 F-150 FX4 with the 5.0. I added a CAI, exhaust, and SCT tune. Do you recommend changing the spark plugs? If so, which ones would be best for my application?

Asked by: Scott Power - 10/22/2014

You really wouldn't need to, unless you're coming up on their maintenance interval or if you're getting a miss or other issue. If you are itching to change your plugs, I'd actually go with the NGK 6509 Spark Plugs, because they're in the factory heat range. The 6510s are one step colder, and there's really not a reason to use them with the modifications that you have.

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Answer provided by: [email protected] (10/23/2014)

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I have a 2011 f150 5.0L. I just did a CAI(s&b) and Tuner from 5 star and am ordering the Borla s type cat back kit. Should I stick with NGK 6509 plugs and if so what gap do you reccomend?

Asked by: John - 11/13/2015

You should probably stick with the 6509s in the factory heat range with your mods, unless you're planning on adding a water-meth kit, nitrous system, or supercharger here in the near future. For your mods, a stock .045" gap is what we'd recommend.

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Answer provided by: [email protected] (11/13/2015)

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I have a 2011 f150 with a 5.0 and i just ordered a boss 302 intake kit. I want to change my spark plugs. Which ngk plugs would you suggest to go with?

Asked by: andrew J - 10/5/2014

If you're only doing the Boss 302R Manifold, then I'd actually recommend sticking with the NGK 6509 Plugs that are in the stock heat range. However, if you are going to supercharge fairly soon, then you can stick with these 6510 plugs that are a step colder than stock.

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Answer provided by: [email protected] (10/6/2014)

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How do these perform over stock plugs? I'm looking for better performance but yet fuel economy.

Asked by: Clint - 8/23/2016

In general, iridium plugs tend to perform a bit better than factory plugs in regards to spark generation. That being said, these particular spark plugs are a heat range colder than stock, and are really meant for supercharged or nitrous applications. If your truck is stock or bolt-on modded, then you should get the NGK 6509 spark plugs instead.

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Answer provided by: [email protected] (8/24/2016)

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I have a 5.0 f150 with boss 302, cai, 3" exhaust catless, and 100 shot of nitrous. Would these plugs work good or would i need to use 3690?

Asked by: Art5.0 - 11/16/2015

In general, dropping down a single heat range over stock would be fine for a 100-shot application, though if you were to go beyond that, using a two-step colder plug could be beneficial. Really, your best bet would be to talk to your custom tuner and see what plug they would prefer you use with your current nitrous setup.

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Answer provided by: [email protected] (11/17/2015)

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I am driving a Ford F-150 with a sct tune and I drive on gas (lpg) that's what we have in THE netherlands. Can you tell me what the best ngk plug is the 6510 or 6509? Nice regards, Stephan van noorden

Asked by: Stephan - 12/27/2015

In general, using a spark plug with a colder heat range than stock (like these 6510s) can be beneficial for use with LPG, however, NGK also has a line of LPG-specific spark plugs that may help you out a bit more. However, your best bet would be to talk to your tuner and see what they recommend.

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Answer provided by: [email protected] (1/4/2016)

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I have a 2011 f150 5.0. All stock except aftermarket exhaust. I have a problem with pinging or spark knock. I have replaced the plugs with factory motorcraft plugs with no help. I also run 89 or sometime 93 octane. I was told running a colder plug should help. What are your thoughts

Asked by: Ben Jones - 1/13/2020

These spark plugs are probably overkill. These spark plugs are colder heat range to handle boost pressure/airflow from supercharger systems, and won't likely solve your problem. Your better bet would be the NGK 6509s, but you'll need to re-gap to .048" to .058" and make sure your gap is consistent. However, you may want to look into your coil packs, especially if your truck has a lot of miles on it.

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Answer provided by: [email protected] (1/14/2020)

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I have a roush CAI and borla s type exhaust. I am running a e85 tune and heard that running lower heat range plugs like these are beneficial to combat preignition. 1) is that true or should i run a different plug and 2) what gap should i use on my 2012 f150 5.0 if i do use these plugs?

Asked by: AJ - 1/6/2021

1). It can be true, but really, you should talk to your tuner and see what plug they recommend. In general, using a colder plug can be helpful when running an aggressive E85 tune. 2). You should go with what your tuner recommends for Gap. In general, tuned trucks should probably be in the .043-.045" range.

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Answer provided by: [email protected] (1/7/2021)

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2011-2017 F150 5.0L V8 NGK 6510 Iridium IX Spark Plugs (Set of 8) LTR7IX-11

6510-LTR7IX-11-5.0l

Improved Spark with One Step Colder Heat Range than Stock

High-Quality Iridium Tip and Corrosion-Resistant Design

I have a 2013 F-150 FX4 with the 5.0. I added a CAI, exhaust, and SCT tune. Do you recommend changing the spark plugs? If so, which ones would be best for my application?

I have a 2011 f150 5.0L. I just did a CAI(s&b) and Tuner from 5 star and am ordering the Borla s type cat back kit. Should I stick with NGK 6509 plugs and if so what gap do you reccomend?

I have a 2011 f150 with a 5.0 and i just ordered a boss 302 intake kit. I want to change my spark plugs. Which ngk plugs would you suggest to go with?

How do these perform over stock plugs? I'm looking for better performance but yet fuel economy.

I have a 5.0 f150 with boss 302, cai, 3" exhaust catless, and 100 shot of nitrous. Would these plugs work good or would i need to use 3690?

I am driving a Ford F-150 with a sct tune and I drive on gas (lpg) that's what we have in THE netherlands. Can you tell me what the best ngk plug is the 6510 or 6509? Nice regards, Stephan van noorden

I have a 2011 f150 5.0. All stock except aftermarket exhaust. I have a problem with pinging or spark knock. I have replaced the plugs with factory motorcraft plugs with no help. I also run 89 or sometime 93 octane. I was told running a colder plug should help. What are your thoughts

I have a roush CAI and borla s type exhaust. I am running a e85 tune and heard that running lower heat range plugs like these are beneficial to combat preignition. 1) is that true or should i run a different plug and 2) what gap should i use on my 2012 f150 5.0 if i do use these plugs?

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