Set of Ford Performance Cold Spark Plugs for the 2013, 2014, 2015, 2016 and 2017 Focus ST and 2016-2017 Focus RS.
When upgrading your 2013-2017 Focus ST or 2016-2017 Focus RS with more modifications it may become necessary to upgrade the spark plugs as well. As the cylinder combustion pressures increase, a colder spark plug may be required. This means adding more boost will require colder spark plugs.
The spark plugs in this set are two heat ranges colder than the stock EcoBoost engine spark plugs. They are the same spark plugs that are included with the Ford Performance Calibration Kit (M-9603A-FST).
Sold as a set of four spark plugs. They come pre-gapped to 0.028-inch (0.71mm).
A colder spark plug does not mean the spark plug uses less voltage or produces less electrical energy. The heat range of a spark plug is the range in which the spark plug works well thermally. The main difference that affects the heat range is the length of the insulator nose. A hotter spark plug has a longer insulator nose and a colder plug has a shorter insulator nose. A longer insulator nose means the path for heat dissipation from the insulator nose to the cylinder heat is longer and the firing end stays hotter. Also, more surface area is exposed to the ignited gases so the spark plug is easily heated to higher temperatures. A colder spark plug functions in the opposite manner.
Using spark plugs with too hot of a heat range may result in detonation. If too cool of a heat range is used, the spark plugs may foul.
Order this Set of Ford Performance M-12405-20T Cold Spark Plugs for your 2013, 2014, 2015, 2016 or 2017 Focus ST or 2016-2017 Focus RS from CJ Pony Parts today!
Product ReviewsWrite a review
Will this require a tuning? I have a 2016 ST with turbosmart BOV and Cobb intake.
do these plugs come pre-gapped for my 2013 titanium.....>? If not....do you know what the OEM gap is suppose to be for this solution>? thanks
I have a 2014 Focus ST with Cobb Accessport V3, Cobb CAI, MBRP 3" catted downpipe, MBRP 3" catback exhaust and Cobb FMIC. Running 93 oct OTS tune with Accessport. Should I replace stock plugs with these and if so do I have to reflash with Accessport?
My original spark plugs that were installed with the FRP tuning/calibration kit need to be replaced. If I use these to replace, will I need to recalibrate using the calibration tool?
What is the recommended gap setting and torque for these plugs?
Are these fine to put into a stock 2014 ST with only a BOV and a COBB intake ? I am not going to be running a bigger turbo for awhile and heard that putting in colder plugs would work good with stock with out fouling
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If you're adding serious horsepower to your Focus ST, it's time to consider a new set of spark plugs. These Ford Racing spark plugs are two heat ranges colder than the factory plugs making them perfect for high boost applications.
These spark plugs are sold as a set of four and are a direct replacement for factory plugs.