Perrin Differential Lockdown System (PSP-SUS-536) | Subaru WRX 2015-2025 / STI 2015-2021

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.