Description
The Mishimoto MMOC-STI-08 is a direct-fit oil cooler kit purpose-built for the 2008+ Subaru WRX STI, centered on a large 19-row cooler that mounts directly in the front bumper for maximum airflow. Every kit ships with preassembled stainless steel braided lines terminating in -10AN fittings, application-specific mounting brackets, and thermal reflective wrap to shield the lines from nearby exhaust heat.
Consistent oil temperature is critical to protecting engine internals under hard driving or track use, and this Mishimoto oil cooler kit is engineered to reduce oil temperatures by 20-30 degrees while maintaining minimal pressure loss, including a documented 20°F (16°C) temperature drop. The kit retains use of the stock liquid-to-liquid oil cooler unit and can be configured with a black or silver cooler finish, plus an optional thermostatic sandwich plate for owners who want even greater control over oil temperature regulation. As with every Mishimoto cooling product, this oil cooler kit is backed by the Mishimoto lifetime warranty.
Vehicle Applications
This Mishimoto direct-fit oil cooler kit is designed for the 2008-2014 Subaru Impreza WRX STI, including the 2011-2014 WRX STI Limited and the 2010 WRX STI Special Edition. It also fits the 2013-2014 WRX STI Base and Sport-tech trims as well as the 2014 WRX STI Tsurugi Edition. The kit is engineered around vehicles equipped with the EJ257 engine and GR/GV chassis codes, and it is compatible only with models using a single scroll turbo and unequal length exhaust manifold; models with a twin scroll turbo and equal length exhaust manifold may not be compatible with this oil cooler kit.
Features
- Large 19-row bar-and-plate oil cooler core for optimal cooling efficiency
- Direct-fit mounting brackets for hassle-free installation in the front bumper
- Preassembled stainless steel braided lines with -10AN male AN flare fittings
- Reduces oil temperatures by 20-30 degrees with minimal pressure loss, including a 20°F (16°C) temperature drop
- Retains use of the stock liquid-to-liquid oil cooler unit
- Includes 2ft of thermal reflective wrap for heat deflection from the nearby exhaust
- Available in silver or black cooler finish
- Optional M20 thermostatic sandwich plate for enhanced oil temperature control
- Backed by the Mishimoto lifetime warranty
Specifications
- Brand: Mishimoto
- Part Number: MMOC-STI-08
- Core Type: Bar-and-Plate
- Core Color: Silver
- Grade Type: Performance
- Finish: Anodized
- Core Row Quantity: 19
- Core Height: 5.43 in
- Core Thickness: 1.97 in
- Core Width/Length: 11 in
- Inlet/Outlet Fitting Type: AN Flare
- Inlet/Outlet Fitting Gender: Male
- Engine Code: EJ257
- Chassis Codes: GR, GV
Frequently Asked Questions
What vehicles does this Mishimoto oil cooler kit fit?
It is a direct fit for the 2008-2014 Subaru Impreza WRX STI, 2011-2014 WRX STI Limited, 2010 WRX STI Special Edition, 2013-2014 WRX STI Base and Sport-tech, and the 2014 WRX STI Tsurugi Edition.
How much does this kit lower oil temperatures?
The kit is proven to reduce oil temperatures by 20-30 degrees while maintaining minimal pressure loss, and delivers a documented 20°F (16°C) temperature drop.
What color options are available?
The cooler is available in either a black or silver finish.
Is a thermostatic option available?
Yes, the kit can be customized with an optional M20 thermostatic sandwich plate for greater oil temperature control.
Does this kit work with all STI turbo configurations?
No. This oil cooler kit only works with models using 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 is included in the kit?
The kit includes application-specific mounting brackets, the 19-row oil cooler, stainless steel braided hoses with -10AN fittings, an M20 thermostatic sandwich plate, an M20 stainless steel sandwich plate adapter, M20 x -10AN straight fittings, 2ft of thermal reflective wrap, mounting hardware, 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.
