Perrin Differential Lockdown System 2015-2026 WRX / 2015-2021 STI / 2013-2025 Crosstrek / 2024-2025 Crosstrek Wilderness / 2012-2025 Impreza YMM_2011_Outback Power Gains: Dyno-proven horsepower and

Power Gains: Dyno-proven horsepower and torque increase

It mounts securely between the Sparco Seat base and Sparco Reclining Seat

making it an ideal upgrade for Subaru enthusiasts seeking reliable performance gains

high-quality water pump replacement

These components work together to improve airflow and driveability while maintaining reliability

Perrin Differential Lockdown System 2015-2026 WRX / 2015-2021 STI / 2013-2025 Crosstrek / 2024-2025 Crosstrek Wilderness / 2012-2025 Impreza YMM_2011_Outback Power Gains: Dyno-proven horsepower andPerrin Differential Lockdown System 2015 2026 WRX 2015 2021 STI 2013 2025 Crosstrek 2024 2025 Crosstrek Wilderness 2012 2025 Impreza Enhanced Traction & Stability Drivetrain Upgrade Overview The Perrin Differential Lockdown System is a precision engineered upgrade designed to improve the rear differential stability on a wide range of Subaru models including WRX, WRX STI, Crosstrek, Crosstrek Wilderness, and Impreza from 2012 through 2026. This system