Forget universal ones if its just a cone, mine didnt make a noticeable difference at all, until i fitted my BMC replica, direct replica of the plastic BMC, and its definetely better than the open cone! feels less laggy and picks up easier if that makes sense lol. have a look on my build thread dude, but i am thinking of mounting the actual box near the battery, as you can remove the front of the box to open it up, and just leave it open at the front. cheap as well but the quality is mint for the price!