Mishimoto 2015-2018 Subaru WRX STI Thermostatic Oil Cooler Kit - Stealth Black (MMOC-STI-15TBK)

Fits 2015-2018 Subaru WRX STI models (Base, Launch Edition, Limited, and Series.HyperBlue).

The Mishimoto Thermostatic Oil Cooler Kit for the 2015-2018 Subaru WRX STI provides critical temperature regulation for both street and track environments. Excess heat degrades oil and puts engine components at risk; this kit is proven to reduce oil temperatures by 20°F (16°C) while maintaining minimal pressure loss across the system. The high-efficiency 19-row cooler mounts in the front bumper for optimal airflow, secured by direct-fit application-specific brackets.

Engineered for a clean installation, the kit features preassembled stainless steel braided lines with -10AN fittings. To protect these lines from the radiant heat of the nearby exhaust, Mishimoto includes thermal reflective wrap for added durability. This thermostatic version includes a specialized sandwich plate that regulates flow until the engine reaches operating temperature, and the system is designed to retain the factory liquid-to-liquid oil cooler unit.

• Reduces oil temperatures by 20°F (16°C)
• Large 19-row stacked-plate oil cooler for maximum heat dissipation
• Thermostatic sandwich plate for improved cold-start protection
• Preassembled stainless steel braided lines with -10AN fittings
• Includes thermal reflective wrap for exhaust heat protection
• Direct-fit mounting brackets for 2015-2018 STI chassis
• Stealth Black finish for a subtle appearance
• Mishimoto Lifetime Warranty
• Manufacturer Part Number: MMOC-STI-15TBK