Mishimoto MMOC-WRX-06T Thermostatic Oil Cooler Kit

The Mishimoto MMOC-WRX-06T is a direct-fit thermostatic engine oil cooler kit designed for the 2006–2007 Subaru WRX and STI. Engineered to reduce oil temperatures by 50°F (34°C) or more, this kit helps protect your engine under high-performance and track-day driving conditions where thermal management is critical.

The kit features a CNC-machined adapter spacer that allows for a straightforward installation without requiring removal of the factory heat shield. The integrated thermostat keeps oil circulating through the engine at lower temperatures until the oil reaches operating temperature, at which point it diverts flow through the cooler — ensuring optimal warm-up times and consistent oil viscosity.

Key Features:

• 50°F+ (34°C+) oil temperature reduction under performance driving conditions
• Thermostatic design — oil only circulates through the cooler once operating temperature is reached
• CNC-machined spacer for direct-fit installation without heat shield removal
• Easily replaceable thermostat — available in 160°F, 180°F, and 200°F ratings for customized fluid temperature control
• Minimal pressure loss through the cooler core and fittings
• Sleek stealth black finish with silver cooler color options available
• Backed by the Mishimoto Lifetime Warranty

Whether you're building a dedicated track car or simply want added engine protection for your WRX or STI, the MMOC-WRX-06T delivers measurable thermal performance gains with a clean, professional installation.