Perrin's brass shifter bushing for 2015 WRX's cable actuated shifter replaces one of the two stock rubber shifter bushing. The Perrin shifter bushing does not change the geometry of the shifting mechanism, so you won't get a shorter throw. What the Perrin bushing does is eliminate the excessive play and sloppiness for more solid gear changes. This will give you a tighter, more confident feel when rowing through the gears, especially for 2-3 and 3-2 shifts. Installation is done from under the car and should take less than 30 minutes with common hand tools.