Mishimoto 2013+ Ford Focus ST Hot Side Intercooler Pipe Kit - Wrinkle BlackOpen up the flow of the charged air in your 2013+ 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% increase in volume