Upgrade your 2015 Subaru WRX STI with the Mishimoto MMOC-STI-15BK Oil Cooler Kit, designed to enhance engine performance and longevity. This high-performance oil cooler features a large 19-row design that mounts seamlessly in the front bumper for optimal airflow and cooling efficiency. Whether you're driving on the street or tackling the track, this kit ensures your engine operates at lower temperatures, reducing oil temperatures by over 20 degrees Fahrenheit for improved reliability. The installation process is hassle-free, thanks to the included direct-fit mounting brackets and preassembled stainless steel lines with -10AN fittings. Additionally, the thermal reflective wrap for the oil lines provides excellent heat deflection from nearby exhaust components. This kit is customizable with your choice of a Stealth Black or Sleek Silver cooler, and options for the Mishimoto Oil Sandwich Plate or the Mishimoto Thermostatic Oil Sandwich Plate. With the Mishimoto Lifetime Warranty, you can trust this product to deliver lasting performance and durability. <b>Features:</b> * 19-row oil cooler design for superior airflow and cooling efficiency: 19-row oil cooler design for superior airflow and cooling efficiency * Proven to reduce oil temperatures by over 20 degrees Fahrenheit: Proven to reduce oil temperatures by over 20 degrees Fahrenheit * Direct-fit mounting brackets for easy installation: Direct-fit mounting brackets for easy installation * Preassembled stainless steel lines with -10AN fittings: Preassembled stainless steel lines with -10AN fittings * Includes thermal reflective wrap for optimal heat deflection: Includes thermal reflective wrap for optimal heat deflection * Customizable with Stealth Black or Sleek Silver cooler options: Customizable with Stealth Black or Sleek Silver cooler options