Perrin's brass shifter bushing for the 2015+ WRX 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. The PERRIN bushing reduces the sloppy feeling during quick gear changes, giving the driver a more precise feel when shifting, especially that crucial 2nd-3rd shift. Installation is done from under the car and should take less than 30 minutes with common hand tools.