Perrin Diff Lockdown for 2015-2022 WRX/STi (PSP-SUS-536) Engine Cover Just like all of our

Just like all of our other performance parts

Fuel rail spacers and hardware

AMS developed the Alpha Performance Porsche 991

(3) -10AN Straight Fitting (21010)

5" Bolt Holes

Perrin Diff Lockdown for 2015-2022 WRX/STi (PSP-SUS-536) Engine Cover Just like all of ourThe Perrin differential lockdown kit for 2015 2022 WRX and STi models adds drivetrain rigidity and precision to throttle input by reducing movement from the rear diff. Under tough driving conditions, the drivetrain and differential will twist, causing a "squishy" or "spongy" feel. This kit will reduce that movement for a better driving experience. Vehicle Fitment: 2015 2023 Subaru WRX 2015 2021 Subaru STi Installation Guide PDF Purchase Includes: (2)