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Why the Mustang EcoBoost High Performance Pack makes less power than the RS

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Although the Focus RS is out of production, its engine will live on, courtesy of a new High Performance Package that was just announced for the Mustang EcoBoost. Along with a pile of handling upgrades, the new performance-oriented Mustang EcoBoost uses the RS’ 2.3-liter turbocharged four-cylinder engine, albeit with a few modifications.


This is a companion discussion topic for the original entry at https://www.hagerty.com/articles-videos/articles/2019/04/15/mustang-ecoboost-high-performance-pack-less-power