I have used the motorsaver filter system for about 2 yrs. It has worked very very well. I like the fact that these filters have increased surface area becuase they are just larger. I always put a new inner and outer element at the beginning of every race day. I also like the way it draws air in from the end and not just all around. I have heard peoe complain about them and I could never undrstand why. I crash with the best of them and I have not had the filter come apart. I don't understand how it comes apart or fails. Can somene explain this further. Thanks.