The Mishimoto top-mount intercooler kit for 2015–2021 Subaru WRX replaces the heat-soaked factory unit with a 4" thick, 625 in³ bar-and-plate core and TIG-welded cast-aluminum end tanks to lower intake temps. It includes a one-piece charge pipe, hoses, an air splitter and hardware for a direct-fit install under an hour. Tested to support setups up to 500 whp and showed a 35°F drop plus measurable bolt-on gains.
Mishimoto 2015 Subaru WRX Top-Mount Intercooler Kit - Powder Coated Black & Black Pipes