Description
The Mishimoto direct-fit oil cooler kit, part number MMOC-WRX-06, was engineered specifically for the Hawkeye-generation Subaru WRX and STI to tame oil temperatures without the guesswork of a universal setup. Built around a 19-row bar-and-plate core finished in silver, this Mishimoto oil cooler kit mounts behind the front bumper and grille for direct, unobstructed airflow, and it’s backed by the Mishimoto lifetime warranty.
Whether you’re pushing your WRX or STI on the street or at the track, elevated oil temperatures accelerate oil breakdown and put your engine at risk. This Mishimoto oil cooler kit is designed to address that head-on, delivering up to a 50°F (34°C) temperature drop with minimal pressure loss while adding .65 qt to total oil capacity. A CNC-machined spacer allows installation without removing the factory heat shield, and buyers can choose between a stealth black or silver cooler, with a thermostatic sandwich plate available for additional oil temperature control. As a purpose-built cooling upgrade rather than a generic mishimoto cooler, it’s tailored to bolt into the factory oil circuit using AN flare fittings.
Vehicle Applications
This Mishimoto oil cooler kit is a direct fit for the 2006–2007 Subaru Impreza WRX, WRX Limited, WRX STI, and WRX TR, as well as the 2007 Subaru Impreza WRX STI Limited. It is built around the EJ255 and EJ257 engine codes found in the GD chassis and works with both automatic and manual applications. Note that it will not fit vehicles equipped with front mount intercoolers, and installers should inspect the oil filter housing for compatibility; fitment has been confirmed against Subaru part 21311AA051.
Features
- 19-row bar-and-plate oil cooler core in a silver, anodized finish
- Mounts behind the front bumper and grille for optimal airflow and cooling efficiency
- Delivers up to a 50°F (34°C) oil temperature reduction with minimal pressure loss
- Adds .65 qt to total oil capacity
- CNC-machined spacer enables installation without removing the heat shield
- Available with a thermostatic sandwich plate for added oil temperature control
- Choice of stealth black or silver cooler finish
- Includes application-specific mounting brackets, oil sandwich plate, stainless steel sandwich plate adapter (M20), banjo fitting with bolt (M20 x -10AN, black), stainless steel braided hoses with -10AN fittings (2ft 2in and 2ft 8in), Thermashield braided line protector, black rubber protector square, and mounting hardware
- Backed by the Mishimoto lifetime warranty
Specifications
- Brand: Mishimoto
- Part Number: MMOC-WRX-06
- Product Type: Cooling
- Core Type: Bar-and-Plate
- Core Row Quantity: 19
- Core Height: 5.43 in
- Core Thickness: 1.97 in
- Core Width/Length: 11 in
- Core Color / Color: Silver
- Finish: Anodized
- Grade Type: Performance
- Inlet Fitting Type: AN Flare (Male)
- Outlet Fitting Type: AN Flare (Male)
- Engine Codes: EJ255, EJ257
- Chassis Code: GD
- Recommended fitting/banjo bolt torque: 15–25 lb-ft (do not exceed 35 ft-lb)
Frequently Asked Questions
What vehicles does the Mishimoto MMOC-WRX-06 oil cooler kit fit?
It is a direct fit for the 2006–2007 Subaru Impreza WRX, WRX Limited, WRX STI, and WRX TR, plus the 2007 Subaru Impreza WRX STI Limited, built around the EJ255 and EJ257 engines in the GD chassis.
How much does this oil cooler kit reduce oil temperature?
The kit is designed to deliver up to a 50°F (34°C) temperature drop with minimal pressure loss.
Does the Mishimoto oil cooler kit affect oil capacity?
Yes, installing the kit adds .65 qt to the total oil capacity.
Will this kit work with a front mount intercooler?
No, this kit will not fit on vehicles equipped with front mount intercoolers. It is compatible with both automatic and manual applications, and the oil filter housing should be inspected for installation compatibility.
What color options are available for this Mishimoto oil cooler?
The kit is available with a stealth black or silver cooler, and this listing’s core is finished in silver with an anodized finish.
What is included in the Mishimoto MMOC-WRX-06 kit?
The kit includes application-specific mounting brackets, a 19-row oil cooler, two stainless steel braided hoses with -10AN fittings (2ft 2in and 2ft 8in), an oil sandwich plate, a stainless steel sandwich plate adapter (M20), a banjo fitting with bolt (M20 x -10AN, black), a Thermashield braided line protector, a black rubber protector square, 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.
