Kartboy Diff Wedgelock Kit Subaru WRX / STI 2015-2021 | KB-003-Wedge Vehicle Model_Golf This allows a cleaner flow

This allows a cleaner flow of water/methanol to be passed into the engine

the PRO-KIT lowers your vehicle’s center of gravity to reduce body roll

and helps increase cornering performance

Part #: BC3960

better temperature stability

Kartboy Diff Wedgelock Kit Subaru WRX / STI 2015-2021 | KB-003-Wedge Vehicle Model_Golf This allows a cleaner flowFitment Information: 2015 2021 Subaru WRX 2015 2021 Subaru STI Features: The Kartboy Wedgelock Kit consists of two rear diff bushings with CNC machined aluminum inserts that "wedge lock" the rear differential. Along with four inserts for the rear subframe. All in Stealth Black. Easy install with hand tools.