Whether you have a rally-inspired WRX or a built STI, maintaining ideal oil temperatures is necessary for both optimal performance and engine longevity. Treat your flat-four to a dose of reliability with the Mishimoto Subaru WRX/STI Direct-Fit Oil Cooler Kit. This kit includes precision engineered application-specific mounting brackets, premade stainless steel braided oil lines, a billet oil sandwich plate, an efficient 10-row stacked-plate Mishimoto oil cooler, and all necessary hardware.