Ford Motorcraft Ecoboost Spark Plugs SP-578 (Set of 6) CYFS-12Y-PT
The SP578 / CYFS-12Y-PT are the stock spark plugs used on the 2015-2017 Ford F-150 2.7L Ecoboost and now, used on the 2017-2019 3.5L Ecoboost Ford Raptor and Ford F-150.
The SP-578 has the benefit of being very close to .032 out of the box. We still recommend verifying gap before installing.
This listing is for a set of 6 plugs, gapped at .032 (verification required). These are OEM Ford Motorcraft plugs. We recommend changing the plugs at every other oil change or around 10-15k miles.
Common symptoms that show spark plugs should be replaced are a rough idle, mis-fires, P0300, P0301, P0302, P0303, P0304, P0305,P0306, cutting out when accelerating, rev limiter feeling.