Mishimoto 15 Subaru STI Thermostatic Oil Cooler Kit - Silver

The 19-row oil cooler in this Mishimoto kit mounts up front in the bumper, where it can catch the most airflow. This is key for keeping your 2015-2018 Subaru WRX STI's oil temperatures under control, especially when you're pushing the car on the street or track. Controlling those fluid temperatures is a big part of making sure your engine stays reliable and keeps putting out consistent power.

Mishimoto designed this kit specifically for the 2015-2018 WRX STI, and it uses direct-fit mounting brackets and pre-assembled stainless steel lines with -10AN fittings. This means installation should be pretty straightforward, without needing any special tools or fabrication. The kit is proven to drop oil temperatures by over 20 degrees Fahrenheit while only causing a small drop in oil pressure. To help protect the lines from heat radiating off the exhaust, it also includes thermal reflective wrap.

You can choose between a sleek silver or stealth black cooler, and you'll also select either the standard sandwich plate or the thermostatic version. The thermostatic plate is a smart choice because it helps the engine warm up faster by blocking oil flow to the cooler until it reaches a certain temperature, and then it opens up to manage heat. This kit comes with Mishimoto's Lifetime Warranty, so you can be confident in its durability.