Description
The Mishimoto MMOC-STI-08BK is a direct-fit, 19-row oil cooler kit purpose-built for the EJ257-powered Subaru WRX STI, engineered to mount its large black anodized bar-and-plate core right in the front bumper for maximum airflow. Backed by proven cooling data, this kit is designed to keep oil temperatures in check on street or track-driven STIs without sacrificing oil pressure.
Consistent fluid temperatures are critical to engine longevity and repeatable power delivery, and this Mishimoto oil cooler kit tackles that head-on. The 19-row cooler is proven to reduce oil temperatures by 20 to 30 degrees while maintaining minimal pressure loss, and one documented result shows a 20°F (16°C) temperature drop. Preassembled stainless steel braided lines with -10AN fittings and application-specific mounting brackets streamline installation, while included thermal reflective wrap shields the oil lines from nearby exhaust heat. For owners who want more precise thermal management, this Mishimoto oil cooler kit can be built with either a black or silver cooler and an optional thermostatic sandwich plate, and every kit is covered by the Mishimoto lifetime warranty.
Vehicle Applications
This Mishimoto direct-fit oil cooler kit is built for the Subaru Impreza WRX STI from 2008 through 2014, including the Impreza WRX STI Limited (2011-2014) and the 2010 Impreza WRX STI Special Edition. It also fits the Subaru WRX STI Base and WRX STI Sport-tech trims for 2013-2014, as well as the 2014 WRX STI Tsurugi Edition. Note that this kit is designed for models equipped with a single scroll turbo and unequal length exhaust manifold; models with a twin scroll turbo and equal length exhaust manifold may not be compatible.
Features
- 19-row bar-and-plate oil cooler with black anodized finish, mounted in the front bumper for optimal airflow and cooling efficiency
- Proven to reduce oil temperatures by 20 to 30 degrees, including a documented 20°F (16°C) drop, while maintaining minimal pressure loss
- Application-specific mounting brackets and preassembled stainless steel braided lines with -10AN fittings for direct-fit installation
- Retains use of the stock liquid-to-liquid oil cooler unit
- Includes 2ft of thermal reflective wrap to deflect heat from nearby exhaust components
- Available in black or silver cooler options
- Optional M20 thermostatic sandwich plate for enhanced oil temperature control
- AN flare fittings with male inlet and outlet fitting gender
- Covered by the Mishimoto lifetime warranty
Specifications
- Brand: Mishimoto
- Part Number: MMOC-STI-08BK
- Color: Black
- Finish: Anodized
- Core Type: Bar-and-Plate
- Core Color: Black
- Core Row Quantity: 19
- Core Height: 5.43 in
- Core Thickness: 1.97 in
- Core Width/Length: 11 in
- Grade Type: Performance
- Inlet/Outlet Fitting Type: AN Flare
- Inlet/Outlet Fitting Gender: Male
- Engine Code: EJ257
- Chassis Codes: GR, GV
- Option: Black Cooler, Non-Thermostatic
- Recommended torque for straight fittings and banjo bolts: 15-25 lb-ft (do not exceed 35 lb-ft maximum)
- Kit Includes: application-specific mounting brackets, 19-row oil cooler, 3ft 6in stainless steel braided hose with 150-degree -10AN fittings, 4ft stainless steel braided hose with 90-degree and 150-degree -10AN fittings, M20 thermostatic sandwich plate, M20 stainless steel sandwich plate adapter, M20 x -10AN straight fittings, 2ft thermal reflective wrap, mounting hardware set, Mishimoto lifetime warranty
Frequently Asked Questions
Which Subaru WRX STI models does this Mishimoto oil cooler kit fit?
This kit fits the Subaru Impreza WRX STI (2008-2014), Impreza WRX STI Limited (2011-2014), Impreza WRX STI Special Edition (2010), WRX STI Base (2013-2014), WRX STI Sport-tech (2013-2014), and WRX STI Tsurugi Edition (2014).
How much does this oil cooler kit lower oil temperatures?
This cooler is proven to reduce oil temperatures by 20 to 30 degrees while maintaining minimal pressure loss, with one documented result showing a 20°F (16°C) temperature drop.
Is this Mishimoto oil cooler kit compatible with all STI turbo configurations?
This oil cooler kit is designed for models with a single scroll turbo and unequal length exhaust manifold. Models with a twin scroll turbo and equal length exhaust manifold may not be compatible.
What color options are available for this oil cooler kit?
The kit is available with either a black or silver cooler; this specific option is the Black Cooler, Non-Thermostatic version.
Can I add thermostatic control to this oil cooler kit?
Yes, there is an optional M20 thermostatic sandwich plate available for even greater oil temperature control.
What is included in the Mishimoto STI oil cooler kit?
The kit includes application-specific mounting brackets, a 19-row oil cooler, a 3ft 6in stainless steel braided hose with 150-degree -10AN fittings, a 4ft stainless steel braided hose with 90-degree and 150-degree -10AN fittings, an M20 thermostatic sandwich plate, an M20 stainless steel sandwich plate adapter, M20 x -10AN straight fittings, 2ft of thermal reflective wrap, a mounting hardware set, and the Mishimoto lifetime warranty.
âš WARNING (California Proposition 65): This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
