Perrin Differential Lock Down System Subaru WRX / STI 2015-2021 | PSP-SUS-536 ModelX_2015-2021 Get the sound you want

Get the sound you want with this awesome midpipe

Better chassis balance

Subaru Impreza is a good performance car designed for rally

Also commonly called the "walbro 450 or 465 lph pump" its the same pump

Recommend full engine disassembly for installation: removal of camshafts

Perrin Differential Lock Down System Subaru WRX / STI 2015-2021 | PSP-SUS-536 ModelX_2015-2021 Get the sound you wantFitment Information: 2015 2021 Subaru WRX 2015 2021 Subaru STI Features: Designed to remove any and all movement from the rear differential under all driving conditions Ideal for street driving or track use Removes the spongy feeling at the point of initial acceleration Plate Material CNC Aluminum Plate Finish Anodize Black Easy Installation Estimated Installation Time 30 Minutes Installation Instructions In The Box: (2) PERRIN Aluminum Lock Down