Boosted Coyote Spark Plug Set - Colder Spark Plugs For 2011-2023 Coyte 5.0 Gen 1-3 (Mustang)
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Coyote Parts
Boosted Coyote Spark Plugs
Adding boost or spray to your Coyote? Don’t let the factory plugs hold you back. These are Ford Performance’s one-step-colder iridium plugs — the same rugged design developed for the Cobra Jet program — built to keep your tune safe when cylinder pressure and heat climb. Eight plugs, pre-gapped, ready to drop in.
Why You Need a Colder Plug
Boost and nitrous pile heat into the combustion chamber. A stock-heat-range plug can’t shed that heat fast enough — and a plug that runs too hot becomes an ignition source, leading to pre-ignition and detonation that can wipe out a piston in seconds. Going one heat range colder pulls that heat out faster and gives your tuner the safety margin to chase real power.
What You Get
-
One heat range colder than stock — ideal for supercharged, turbo, and nitrous Coyotes
-
Genuine Ford Performance iridium plugs — robust race-bred construction from the Cobra Jet program
-
Pre-gapped to 0.035″ from the factory — a safe starting point you can tighten for higher boost
-
Complete set of 8 — everything your V8 needs in one box
-
Direct fit, no modification — OEM thread, reach, and seat
Spark Plug Gap Guide
These plugs ship pre-gapped at 0.035″, which suits naturally aspirated and mild builds. As boost climbs, the denser charge makes it harder for the spark to jump the gap — so you tighten it. Use the chart below as a starting point:
|
Setup / Power Level |
Suggested Gap |
Notes |
|---|---|---|
|
Naturally aspirated / mild bolt-ons |
0.035″ (as shipped) |
Factory pre-gap — good to go |
|
Mild boost (~5–9 psi) |
0.032″–0.035″ |
Tighten slightly as boost rises |
|
Street boost / 600–800 whp |
0.028″–0.032″ |
Common range for built street cars |
|
High boost (18+ psi) / big power |
0.022″ or tighter |
Confirm with your calibrator; may need upgraded coils |
Tuner’s rule of thumb: tighter gap + colder plug as boost goes up. These figures are starting points only — always follow your tuner’s recommendation for your exact combination of boost, fuel, and ignition. On very high-boost builds, an upgraded coil or CDI setup can let you open the gap back up for a stronger, more complete burn.
Specifications
|
Part Number |
M-12405-M50A |
|
Heat Range |
One step colder than stock Coyote |
|
Tip Material |
Iridium, projected center electrode |
|
Thread / Reach |
14mm thread, 0.750″ (19.05mm) reach, tapered seat |
|
Factory Gap |
0.035″ |
|
Quantity |
Set of 8 |
|
Best For |
Forced induction & nitrous applications |
Cheap insurance for a serious engine.
Before you turn up the boost, give your Coyote the plugs it needs. Add the M-12405-M50A set to your cart and run safe.
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Wild 5 Performance
Email: coyote@wild5racing.com
Business Address: 419 Delaware Dr. Westerville, OH
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