Perrin Oil Cooler Kit | 2002–2014 WRX / 2004–2021 STI | PSP-OIL-110

The Perrin PSP-OIL-110 oil cooler kit is a complete solution for reducing engine oil temperatures on the 2002–2014 Subaru WRX and 2004–2021 STI. Lower oil temps mean extended engine life, more consistent horsepower under sustained load, and better protection during track days or spirited driving.

Bar and Plate Core

Perrin's high-efficiency bar-and-plate core maximizes heat dissipation without restricting oil flow or sacrificing oil pressure. More durable than tube-and-fin designs — the bar-and-plate construction resists road debris damage and features stronger mounting holes and hose connection points.

Integrated Thermostat

The Perrin filter adapter includes an integrated 85°C (185°F) thermostat. Oil reaches optimal operating temperature within the engine before being routed to the cooler — preventing overcooling during warm-up and cold weather driving.

Oil Spacer

A Perrin oil spacer is included to allow clean installation of the thermostat-filter assembly alongside a new OEM Subaru oil filter.

304 Stainless Steel Mounting Brackets

Custom 304SS brackets mount the cooler to the front of the vehicle securely and are built to last the life of the car.

Pre-Assembled Aeroquip Hoses with Pyrojacket

Lightweight Aeroquip -10 hoses rated to 250 psi and 300°F continuous temperature come pre-assembled and wrapped in industrial-grade Pyrojacket — rated for continuous exposure to 500°F (260°C) and up to 2,000°F (1,090°C) for 15–20 minutes.

Vehicle Fitment

• 2002–2014 Subaru WRX
• 2004–2021 Subaru WRX STI

Specs

• Core Type: Bar and plate
• Thermostat: 85°C (185°F) integrated
• Hose: Aeroquip -10, 250 psi / 300°F rated
• Hose Wrap: Pyrojacket (500°F continuous)
• Bracket Material: 304 stainless steel
• Part Number: PSP-OIL-110
• Weight: 11.9 lbs