2011-2021 Ford F150 & Ford Mustang 5.0L Ford Performance Cold Spark Plugs (Set of 8) | M-12405-M50A

Name: 2011-2021 F150 & Mustang 5.0L Ford Performance Cold Spark Plugs
Brand: Ford Performance
SKU: M-12405-M50A
Price: 70.10 USD
Availability: InStock

2011-2021 F150 & Mustang 5.0L Ford Performance Cold Spark Plugs

SKU M-12405-M50A

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Highlights:

Set of plugs for boosted 5.0L V8s
Feature colder heat range and tighter gap
Designed for Ford Performance superchargers
Drop-in replacements for stock spark plugs
Durable and reliable iridium tips
.035" gap with 7 heat range
Backed by a 2-year limited warranty

High-Performance Ford Performance Spark Plugs with Cold Heat Range

Supercharging the big, bad Coyote 5.0L V8 under the hood of your 2011-2021 F150 or 2011-2021 Mustang GT is a quick way to make huge power, but you may find that the stock spark plugs just aren't up to the task. The Ford Performance Cold Spark Plug Set comes with eight Ford Performance designed, iridium-tipped spark plugs that are a heat range colder than stock and gapped tighter to help prevent spark blowout when running superchargers, turbos, or nitrous systems. Ford Performance specifically designed these spark plugs for use with their own lineup of superchargers and came stock on the 2018 Cobra Jet Mustangs, but will also fit any F150 or Mustang equipped with a 5.0L Coyote V8. The colder heat range of the spark plugs makes them more effective with the large airflow and cooler cylinder temps caused by adding boost pressure, while their tighter gap helps prevent spark blowout so that your motor runs at its best, even when fitted with extremely powerful supercharger.

High-Quality, Drop-In Spark Plugs with Iridium Tips and Tight Gaps

Ford Performance carefully designed their Cold Spark Plugs to handle extremely powerful 5.0L V8 engine builds, even those equipped with extremely powerful supercharger systems. Each spark plug is this set features a standard OEM spark plug sizing with a 14mm thread and OE-style ceramic insulator to give you and your F150 or Mustang build a perfect, drop-in fitment in place of stock. The Ford Racing 5.0L Cold Spark plugs feature an iridium tip that gives them excellent reliability and a stable spark no matter home much boost pressure your F150 or Mustang is running. The electrodes are pre-gapped to a tight .035" that helps resist blow-out in high-boost applications so that your 5.0L doesn't suffer misfires or breakup when you punch the throttle. The Ford Performance Cold Spark Plugs install right into place of your 5.0L's stock spark plugs and come backed by a 2-year limited warranty from Ford Performance.

Fitment:

2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 F150 5.0L
2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Mustang GT 5.0L

Spark Plug Specifications:

Thread Size: 14mm
Heat Range: 7
Wrench Diameter: 5/8"
Gap: 0.035"

For supercharged or boosted applications: these spark plugs are only recommended for use on supercharger, turbocharged, or nitrous-equipped vehicles that require a colder heat range and tighter spark plug gap than stock. They are not recommended for bone stock applications or vehicles solely equipped with basic bolt-ons and tuning.

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I have a 2018 f150 5.0 with massive CAI, long tube headers, tune. Am I able to regap these to non boost specs, and get the benefit of the cooler application?

Asked by: 5.0runner - 5/5/2025

These are not recommended to run on a bolt on only vehicle. We've never tried this and could not guarantee what results you would have.

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Answer provided by: Joel Galaz (5/6/2025)

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I have a 2015 f150 with the gen 2 coyote, S&B Cold air intake, 3 inch cat back several 5 star tubes. Throttle body spacer, catch can . But I have low rpm spark knock no matter what octane fuel I run. I've heard cooler plugs may help this. What are your thoughts? Please advise

Asked by: Scott - 3/30/2024

These plugs would not be recommended on naturally aspirated engines so we could not guarantee what results you would have. We would recommend reaching out to the calibrators at 5 star with the issues you are having. They will most likely have you do some datalogging for them so they can see what the truck is doing and can make adjustments or recommendations based off the data from the log files.

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Answer provided by: Joel Galaz (4/3/2024)

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These are pregapped out of the box to .035 correct?

Asked by: Briank - 2/19/2022

According to Ford Performance, that is correct. That being said, it is still a good idea to check before installation.

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Answer provided by: Jason@Stage3 (2/22/2022)

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What’s the concessions on running these on a stock 5.0L v8? I purchased them and now I don’t want to harm my engine, I read that they will work with a stock engine, is that correct?

Asked by: Keepontrucking - 12/29/2021

Colder plugs in a stock engine generally won't hurt anything as far as permanent damage or anything like that. The only real issue is that you may get some accelerated fouling of the plugs and eventual misfires without a lot of benefit. If you are planning on adding mods or a supercharger in the near future, then may not have an issue.

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Answer provided by: Jason@Stage3 (12/29/2021)

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Are these good with a 5.3L stroker coyote with cams, cnc ported heads etc.. but not boosted (yet)?

Asked by: Matt - 8/28/2021

As long as your heads can accept the stock spark plugs, you'd be able to use these. That being said, it would probably be a good idea to talk to your custom tuner and see what plugs they recommend.

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Answer provided by: Jason@Stage3 (8/30/2021)

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WARNING: Cancer and Reproductive Harm

This product can expose you to chemicals including those known to the State of California to cause cancer and birth defects or other reproductive harm.

For more information, visit [www.p65warnings.ca.gov](https://www.p65warnings.ca.gov).

2011-2021 Ford F150 & Ford Mustang 5.0L Ford Performance Cold Spark Plugs (Set of 8) | M-12405-M50A

High-Performance Ford Performance Spark Plugs with Cold Heat Range

High-Quality, Drop-In Spark Plugs with Iridium Tips and Tight Gaps

I have a 2018 f150 5.0 with massive CAI, long tube headers, tune. Am I able to regap these to non boost specs, and get the benefit of the cooler application?

I have a 2015 f150 with the gen 2 coyote, S&B Cold air intake, 3 inch cat back several 5 star tubes. Throttle body spacer, catch can . But I have low rpm spark knock no matter what octane fuel I run. I've heard cooler plugs may help this. What are your thoughts? Please advise

These are pregapped out of the box to .035 correct?

What’s the concessions on running these on a stock 5.0L v8? I purchased them and now I don’t want to harm my engine, I read that they will work with a stock engine, is that correct?

Are these good with a 5.3L stroker coyote with cams, cnc ported heads etc.. but not boosted (yet)?

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