I installed this along with Group N tranny mount and Whiteline trans crossmember bushings. This is one of the best drivability mods for the price! Especially for the 2015+ WRX. This mod removes the slop from the rear diff and it feels great. Night and day difference. Starting from first is so much smoother. Especially when coasting at slow speeds and going into first. With these mods, jerkyness is reduced by at least 90%. Highly recommend this mod! Especially since it’s so cheap, it’s amazing how big of a difference this made!