The Mishimoto oil cooler kit for 2001–2005 Subaru WRX and STi is a direct-fit front-grille-mounted cooler that drops oil temperatures by over 20 degrees, aimed at improving thermal control for street or track use. The kit installs in roughly two hours and is available in silver or stealth black. Mishimoto backs the kit with a Lifetime Warranty; a thermostatic option and low pressure-loss characteristics are also noted.
Mishimoto 01-05 Subaru WRX/STi Oil Cooler Kit