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SKU: MMOC-WRX-01T | UPC: 748354010718
Mishimoto 02-05 Subaru WRX/STI Thermostatic Oil Cooler Kit
Maintain ideal oil temperatures in your 2002-2005 Subaru Impreza WRX or 2004-2005 WRX STI with this direct-fit thermostatic oil cooler kit from Mishimoto. Engineered for rally-inspired builds, it includes a 10-row stacked-plate cooler, billet sandwich plate with rear-mounted thermostat, premade stainless steel braided -10AN lines, and application-specific brackets for reliable cooling. This setup drops oil temps by more than 20°F, adds 0.5 quarts of capacity, and keeps pressure loss minimal for sustained performance and engine protection.
Key Features
- 10-Row Stacked-Plate Oil Cooler: Efficient design with 11.02 x 4.88 x 1.75-inch core size pulls heat effectively from oil in high-demand driving.
- Rear-Mounted Thermostat: Opens at 160°F to regulate flow, preventing overcooling in cold conditions while activating cooling when needed.
- Stainless Steel Braided Lines: Premade -10AN PTFE-lined hoses ensure leak-free durability and exact-fit routing without custom fabrication.
- Billet Aluminum Sandwich Plate: Precision-machined adapter mounts between filter and block for seamless integration and added oil volume.
- Application-Specific Brackets: Custom aluminum mounts position the cooler optimally with all hardware included for plug-and-play install.
Product Notes
- Choose Sleek Silver or Stealth Black cooler finish for style matching your build.
- Pairs with Mishimoto WRX/STI radiator, fan shroud, and silicone hoses for complete cooling upgrade.
- Backed by Mishimoto Lifetime Warranty for long-term reliability.
Installation Notes
- Professional installation recommended.
- Direct bolt-on fit requires no cutting or permanent modifications to engine bay.
- Uses factory oil filter location. includes all fittings, seals, and hardware for M20x1.5 filter thread.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2002-2005 | Subaru | Impreza | WRX |
| 2004-2005 | Subaru | Impreza | WRX STI |
Why Choose Mishimoto?
- Proven in motorsports with rally-proven cooling solutions for Subaru flat-four engines.
- Direct-fit engineering tested for thousands of hours on dyno and track.
- CNC-machined components from high-grade aluminum and stainless steel for lasting strength.
Frequently Asked Questions
-
Q: Will this fit my 2004 WRX STI?
A: Yes, direct fit for all 2004-2005 USDM Impreza WRX STI models with EJ255 engine using factory oil filter housing. -
Q: What materials are used in the cooler and lines?
A: All-aluminum stacked-plate core with TIG-welded end tanks, plus stainless steel braided PTFE hoses rated for 1000+ PSI burst pressure. -
Q: What is the warranty coverage?
A: Mishimoto Lifetime Warranty covers defects in materials and workmanship for as long as you own the vehicle.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Securely packed in single box 17in x 12in x 7in
- Weight: 9.68 lbs
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