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Prices may varyThis product ranks #3 of 31 in Spark Plug.
Last reviewed May 28, 2026
TL;DR Motorcraft SP-580X (CYFS-12Y-T4X) is Ford's OEM iridium plug for the 3.5L EcoBoost and 5.0L Coyote V8, pre-gapped to 0.035 in, 60,000-mile Ford-specified interval.
Motorcraft is Ford's OEM parts brand; SP-580X and CYFS-12Y-T4X are the same part under dual numbering, superseding the platinum-generation SP-534. Iridium center electrode; tip diameter not disclosed. Thread spec is M14x1.25 per Ford OEM (Amazon incorrectly lists M10x1.0). Ford specifies a 60,000-mile interval; community reports confirm reaching interval with appropriate wear and correct gap at removal; removal-photo evidence not yet located. Fitment confirmed across 3.5L EcoBoost F-150, Expedition, and Explorer; one conflicting report disputes 5.0L Coyote fitment.
Right pick for 14th-gen F-150 owners with the 3.5L EcoBoost or 5.0L Coyote V8 wanting the Ford OEM plug; community-confirmed EcoBoost fitment, gap pre-set. Skip for the 2.7L EcoBoost, which takes the SP-542.
No chemical exposure pathway: ceramic-and-steel ignition part, no SDS. Iridium electrodes carry a small precious-metal mass offset by the 60,000-mile interval vs. copper. Steel shell recyclable; ceramic insulator landfills. No take-back program as of 2026.
The SP-580X (Ford dealer part number CYFS-12Y-T4X) is the Ford OEM spark plug for the 3.5L EcoBoost and 5.0L Coyote V8 in the 14th-generation Ford F-150 (2021-2026). Community reviews also confirm it for the Ford Expedition and Ford Explorer 3.5L EcoBoost across several model years. The 2.7L EcoBoost uses a different plug (SP-542/CYFS-12Y-T3); confirm via Ford's application guide for your specific engine.
That is an Amazon catalog data entry error. The Ford OEM spec for the 3.5L EcoBoost and 5.0L Coyote cylinder head is M14x1.25. Amazon also incorrectly lists 'Vehicle Service Type: Motorcycle' for this part number. Both are known errors in Amazon's product database, not in the plug itself. The plug fits standard Ford V6 and V8 cylinder heads with M14x1.25 threads.
Ford specifies a 0.035 in factory gap for this application. Multiple owners confirm the plugs arrive pre-gapped to spec out-of-box. Ford's OEM service interval for this plug in the 3.5L EcoBoost and 5.0L Coyote is 60,000 miles. Community reports confirm reaching 60,000 miles on an EcoBoost with appropriate wear and correct gap at removal.
Yes. The single-plug ASIN (B09GW9RFP7) is an Amazon add-on item and requires a minimum qualifying order or a Subscribe and Save purchase to buy standalone. If you need to buy singles without bundling, consider adding other qualifying items to your cart, or check the Pack of 2 (B0CDQN11X4) for separate add-on item status.
Marketing copy from Motorcraft, via Amazon. Not editorial.
Per manufacturer cross-reference. Verify on Amazon before purchase.
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