Perrin's 6 Spd Shifter Bushings for 2004-2021 Subaru STI offer a tangible performance upgrade, replacing the standard rubber shifter mount bushings with more rigid urethane alternatives. These bushings are designed to reduce shift play and sloppiness, leading to a tight, reliable gear change. Installation is straightforward and can be done with regular hand tools in an hour or less without affecting shifting geometry. For maximum shifting precision, pair these bushings with Perrin's short throw lever.