Ford Focus ST Hot-Side Intercooler Pipe Kit, 2013-2018, PolishedOpen up the flow of the charged air in your 2013 2018 Ford Focus ST with the Mishimoto hot side intercooler pipe. The stock hot side pipe in your Focus ST is plagued with bends, a restrictive inner diameter and muffling equipment which slows the airflow and causes turbulence on the way to the intercooler. Mishimoto's hot side intercooler kit not only reduces the amount of bends, but also increased the diameter to 2. 5? giving it a 14 percent increase