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This Mishimoto thermostatic oil cooler kit for the 2015 Subaru WRX STI includes a stealth black 19‑row cooler, preassembled stainless steel lines with -10AN fittings, and a thermostatic sandwich plate option. The package is designed to lower oil temperatures by about 20°F with minimal pressure loss, includes thermal protective wrap for the lines, and comes backed by Mishimoto’s lifetime warranty.
Mishimoto 15 Subaru STI Thermostatic Oil Cooler Kit - Black
