These plugs are 1 step colder than OEM and are perfect for those pushing the limits — whether you’re running a big turbo setup or maxing out your stock turbo. Designed for performance and reliability under high boost, these plugs come pre-gapped to our EMS spec and are ready to install right out of the box.
Just pull them out, drop them in, and get back to boosting.
Available in sets of 4 or 6 plugs to support both 4-cylinder and 6-cylinder EcoBoost platforms.
THE RR12S Spark Plugs DO NOT FIT THE S650 ECOBOOST MUSTANG
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