Description
The Mishimoto Subaru WRX/STI Direct-Fit Oil Cooler Kit (MMOC-WRX-01TBK) pairs a stealth black, anodized 10-row stacked-plate oil cooler with a rear-mounted thermostatic oil sandwich plate, giving your flat-four engine dedicated oil cooling without guesswork on fitment. Every bracket, line, and fitting in this Mishimoto oil cooler kit is application-specific, designed to bolt onto the WRX/STI platform with premade stainless steel braided lines rather than a universal setup you have to fabricate around.
Consistent oil temperature is critical to engine longevity on a car that sees track days, autocross, or spirited street driving, and this Mishimoto cooling kit is built to keep pace. It adds .5 qt of additional oil capacity, drops oil temperatures by more than 20 degrees Fahrenheit, and does so with only minimal pressure loss so lubrication delivery stays consistent. The included billet oil sandwich plate with rear-mounted thermostat brings additional oil temperature regulation into the mix, letting the system stay closed until the oil is ready to be cooled, which helps maintain more stable operating temperatures across a range of driving conditions. As a Mishimoto oil cooler kit, it’s engineered to complement the rest of a Subaru cooling upgrade path, including Mishimoto’s Performance Aluminum Radiator, Performance Aluminum Fan Shroud Kit, and Silicone Radiator Hose Kit.
Vehicle Applications
This kit is a direct fit for the 2002–2005 Subaru Impreza WRX and the 2004–2005 Subaru Impreza WRX STI, covering GD-chassis cars running the EJ205 and EJ255 engines, and it fits both automatic and manual applications. Installation does require trimming of the exhaust heat shield, and this kit will not fit vehicles equipped with front mount intercoolers.
Features
- 10-row stacked-plate Mishimoto oil cooler with a bar-and-plate core in a black anodized finish
- Application-specific mounting brackets for a true direct-fit installation
- Premade stainless steel braided oil lines, including a 3-ft and a 4-ft 4-in section, with -10AN fittings
- Billet oil sandwich plate with rear-mounted thermostat for extra oil temperature control
- Stainless steel sandwich plate adapter (M20), black banjo fitting with M20 x -10AN bolt, and black rubber seal
- Complete mounting hardware set included
- Adds .5 qt of additional oil capacity
- Reduces oil temperatures by more than 20°F with roughly 2 psi of pressure loss
- Male AN Flare inlet and outlet fittings
- Backed by the Mishimoto Lifetime Warranty
Specifications
- Core Type: Bar-and-Plate
- Core Row Quantity: 10
- Core Height: 2.76 in
- Core Thickness: 1.97 in
- Core Width: 11 in
- Core Color / Finish: Black, Anodized
- Grade Type: Performance
- Inlet Fitting Type: AN Flare, Male
- Outlet Fitting Type: AN Flare, Male
- Chassis Code: GD
- Engine Codes: EJ205, EJ255
- Recommended torque for straight fittings and banjo bolts: 15-25 lb-ft (do not exceed 35 ft-lb maximum)
Frequently Asked Questions
Which vehicles does this Mishimoto oil cooler kit fit?
This kit is a direct fit for the 2002–2005 Subaru Impreza WRX and the 2004–2005 Subaru Impreza WRX STI, GD-chassis vehicles running the EJ205 or EJ255 engine, in both automatic and manual applications.
Does this version of the kit include a thermostat?
Yes, this option (Black Cooler, Thermostatic) includes the Mishimoto Oil Sandwich Plate with Rear-Mounted Thermostat for additional oil temperature control.
How much does this kit lower oil temperature?
The kit reduces oil temperatures by more than 20 degrees Fahrenheit while providing minimal pressure loss, listed at around 2 psi.
Will this oil cooler kit work with a front mount intercooler setup?
No. This kit will not fit on vehicles equipped with front mount intercoolers, and installation requires trimming of the exhaust heat shield.
What is included in the Mishimoto Subaru WRX/STI Oil Cooler Kit?
The kit includes application-specific mounting brackets, a 10-row oil cooler, a 3-ft stainless steel braided hose with -10AN fittings, a 4-ft 4-in stainless steel braided hose with -10AN fittings, an oil sandwich plate, a stainless steel sandwich plate adapter (M20), a black banjo fitting with M20 x -10AN bolt, a black rubber seal, a mounting hardware set, and the Mishimoto Lifetime Warranty.
What warranty comes with this cooler?
This kit 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.
