The Mishimoto intercooler kit with polished piping for 2013–2018 Ford Focus ST upgrades the stock intercooler with a bar-and-plate core and larger mandrel-bent aluminum piping, eliminating the restrictive turbo muffler. The kit increases hot-side flow by 26% and overall intercooler flow by 21%, improving cooling efficiency and reducing heat soak. When combined with other Mishimoto parts it typically yields about 8 HP and 10 lb-ft, backed by a lifetime warranty.
Mishimoto 2013+ Ford Focus ST Black Intercooler w/ Polished Pipes