Perrin CVT Transmission Oil Cooler Kit for 2022-2025 WRX Base | PSP-OIL-203

PERRIN's PSP-OIL-203 adds an external SPT/CVT fluid cooler to 2022-2025 WRX Base models that were not supplied with the factory front cooler. The full kit uses an eight-row bar-and-plate core, stainless mounting brackets, M22 fittings, and the hoses and connectors needed to route fluid from the transmission. It is distinct from PSP-OIL-202, which replaces the original cooler on factory-equipped SPT/CVT trims. Installation requires front-bumper removal, hose cutting and routing, leak checks, and a correct transmission-fluid level check; PERRIN warns against high-load or extended driving until the factory CVT fill procedure has been completed. PERRIN does not list MY2026 Base fitment. The kit is incompatible with PERRIN's front engine-oil cooler and HELLA horn bracket, and it requires no calibration.