The only one that will fit and it's a tight fit is the TurboXS SML BOV. It really is up to you if you want to upgrade it now or not. If your doing a fmic in the near near future then wait. If your not then this would be a good thing to do. When I installed mine I felt it held boost way better and the sound is really nice and clean. The main reason to replace it is because the stock one is prone to getting tears in the rubber