Perrin Differential Lockdown System (PSP-SUS-536) | Subaru WRX 2015-2025 / STI 2015-2021
Description
Description
The Perrin Differential Lockdown System stabilizes the rear differential to reduce drivetrain movement, enhance throttle response, and deliver a more connected driving feel.
KEY FEATURES
- Reduces differential flex under acceleration
- Improves traction and power transfer
- Increases drivetrain stability during spirited driving
- Durable construction for long-term performance
- Direct-fit installation with no permanent modifications
VEHICLE FITMENT
- Subaru WRX (2015–2025)
- Subaru STI (2015–2021)
Perrin products are engineered for precision Subaru performance and long-term reliability.

