Description
The Mishimoto MMOC-WRX-08 is a direct-fit oil cooler kit purpose-built for the turbocharged EJ255-powered Subaru WRX, pairing a 19-row bar-and-plate cooler with application-specific mounting brackets and a CNC-machined aluminum spacer that keeps the factory exhaust manifold heat shields intact. Since the WRX never came from the factory with an oil cooler, this Mishimoto kit fills that gap with a silver, anodized cooler and a choice of standard or thermostatic sandwich plates for added control over oil temperature.
Whether you’ve modified your WRX or spend time tracking it, managing oil temperature is critical to protecting your engine over the long haul. This Mishimoto cooling solution is a full bolt-on kit that requires no modification to install and works alongside your car’s stock liquid-to-liquid heat exchanger to allow proper fluid warm-up while still delivering serious cooling once the oil is up to temperature. The manufacturer notes the kit is engineered to help oil temperatures drop by as much as 60 degrees with minimal pressure loss, and Mishimoto has also reported a proven 25°F (13.9°C) drop in oil temperature during testing. As a Mishimoto oil cooler kit, it also adds roughly 0.75 qt of additional oil capacity to the system.
Vehicle Applications
This kit is a direct fit for the 2008-2014 Subaru Impreza WRX, including the 2010 Impreza WRX GT and SE, the 2010-2014 Impreza WRX Limited, and the 2009-2014 Impreza WRX Premium. It also fits the 2012-2014 WRX Base, 2013-2014 WRX Limited, 2014 WRX SE, and 2012-2014 WRX STI. Coverage corresponds to the EJ255 engine and GH, GE, GR, and GV chassis codes.
Features
- Direct fit for the 2008-2014 Subaru WRX
- 19-row oil cooler strategically mounted in the lower grille for maximum airflow
- Proven 25°F (13.9°C) drop in oil temperature
- Full bolt-on oil cooling solution for street and track vehicles
- No modification necessary for installation; functions with all stock equipment
- CNC-machined application-specific sandwich plate
- Works in conjunction with the stock liquid-to-liquid heat exchanger for proper fluid warm-up and regulation
- Includes preassembled stainless steel braided oil lines with -10AN fittings
- Cooler available in Sleek Silver or Stealth Black
- Increases oil capacity by 0.75 qt
- Retains use of the stock liquid-to-liquid oil cooler unit
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Brand: Mishimoto
- Part Number: MMOC-WRX-08
- Color / Core Color: Silver
- Finish: Anodized
- Grade Type: Performance
- Core Type: Bar-and-Plate
- Core Row Quantity: 19
- Core Height: 5.43 in
- Core Thickness: 1.97 in
- Core Width: 11 in
- Inlet Fitting Type: AN Flare, Male
- Outlet Fitting Type: AN Flare, Male
- Engine Code: EJ255
- Chassis Codes: GH, GE, GR, GV
- Recommended torque for straight fittings and banjo bolts: 15-25 lb-ft (do not exceed 35 ft-lb)
- Kit Includes: application-specific mounting brackets and spacer, 19-row oil cooler, 2 ft 11 in stainless steel braided hose with 45-degree and 150-degree -10AN fittings, 3 ft 6 in stainless steel braided hose with 45-degree and 90-degree -10AN fittings, M20 thermostatic sandwich plate, 15mm CNC sandwich plate spacer, application-specific M20 sandwich plate adapter, M20 x -10AN straight fittings, 2 ft of thermal reflective wrap, mounting hardware set, and Mishimoto Lifetime Warranty
Frequently Asked Questions
What vehicles does this Mishimoto oil cooler kit fit?
It is a direct fit for the 2008-2014 Subaru Impreza WRX (including the 2010 WRX GT and SE, 2010-2014 WRX Limited, and 2009-2014 WRX Premium) as well as the 2012-2014 WRX Base, 2013-2014 WRX Limited, 2014 WRX SE, and 2012-2014 WRX STI, corresponding to the EJ255 engine and GH, GE, GR, and GV chassis codes.
Does installation require any vehicle modification?
No, the kit requires no modification for installation and functions with all stock equipment.
What color and sandwich plate options are available?
The cooler is available in Sleek Silver or Stealth Black, with a choice of standard or thermostatic sandwich plates; this listing is the Silver Cooler, Non-Thermostatic option.
How much does this kit reduce oil temperature?
Mishimoto states the kit is engineered to reduce oil temperatures by as much as 60 degrees with minimal pressure loss, and separately reports a proven 25°F (13.9°C) drop in oil temperature.
What is included in the kit?
The kit includes application-specific mounting brackets and spacer, a 19-row oil cooler, preassembled stainless steel braided hoses with -10AN fittings, an M20 thermostatic sandwich plate, a 15mm CNC sandwich plate spacer, an application-specific M20 sandwich plate adapter, M20 x -10AN straight fittings, 2 ft of thermal reflective wrap, mounting hardware, and the Mishimoto Lifetime Warranty.
Does this kit carry a warranty?
Yes, it is backed by 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.

















