This Mishimoto top-mount intercooler kit for 2002–2007 Subaru WRX and 2004–2007 STI features a single-entry inlet to replace the stock Y-pipe for improved airflow and air dispersion. The efficient bar-and-plate core increases volume and heat transfer while the bolt-on kit includes silicone bypass and crankcase hoses, throttle-body hose, bypass gasket, T-bolt clamps and hardware. It has been tested to lower AITs and support up to 350 hp.
Mishimoto Subaru 02-07 WRX/04-07 STi Top-Mount Intercooler Kit - Silver/Black Hoses - Not For iRHD