Perrin Thermostatic Oil Cooler Kit - Subaru WRX 01-14/STI 01-21

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  • Regular price $1,494.95
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Note: 2001-2007 WRX and STI will require Subaru Part Number 21328AA140, the coolant crossover pipe for installation. For all vehicles, an existing hole on lower frame will need to be enlarged and therefore tools and mechanical knowledge are necessary.


Reduce engine oil temperatures, extend engine life, and keep your horsepower consistent with a PERRIN Oil Cooler.

Why You Want This

In racing conditions engine oil temperature skyrockets. This causes decreased engine performance and reduces the oil's ability to properly lubricate. A well designed engine oil cooling system like the PERRIN Oil Cooler Kit will help keep temperatures within the desired temperature range, thus maintaining performance and prolonging engine life. Most setups can see a drop of approximately 15°-20°F at 7000 RPM.

Heat Exchanger

Each PERRIN oil cooler uses a high-efficiency PERRIN bar and plate-style oil cooler core. This core design maximizes heat dissipation without restricting oil flow to ensure your engine is fed with full oil pressure. This bar and plate design is much stronger and withstands damage from normal road debris more efficiently than tube and fin type cores. The mounting holes and hose connection points are also more durable.

Integrated Thermostat

The PERRIN Filter Adapter features an integrated 85°C (185°F) thermostat. This means your oil will reach the optimum operating temperature of 85°C within the engine before it is released to the oil cooler.

Oil Spacer

In addition to a new OEM oil filter from Subaru, we include a PERRIN Oil Spacer to allow for easy installation of the thermostat-filter assembly.

Mounting Brackets

The PERRIN Oil Cooler comes with custom brackets that allow the oil cooler to mount easily to the front of your vehicle. Made with 304SS to ensure the brackets last the life of the car.

Preassembled Hoses

The PERRIN Oil Cooler Kit features lightweight Aeroquip brand -10 hose that are rated for 250psi and 300°F continuous temperature. Each hose comes pre-assembled and wrapped with our Industrial grade Pyrojacket that can withstand continuous exposure to 500° F (260°C) and up to 2000°F (1090°C) for 15-20 minutes.


Kit Includes:

  • (1) PERRIN Oil Cooler Core
  • (1) PERRIN Oil Filter Spacer
  • (1) Thermostat Oil Filter
  • (1) Oil Line Assembly, Short
  • (1) Oil Line Assembly, Long
  • (2) PERRIN Mounting Brackets
  • All Hardware for Installation
  • Warranty & Instructions


Installation Instructions:

Click here to download


Vehicle Fitment:

  • 2006-2007 Subaru WRX (requires Subaru Part Number 21328AA140, the coolant crossover pipe)
  • 2008-2014 Subaru WRX