We will give an easy tip here on the alignment and this will help tremendously as you will see the ease of snapping it together in the video below. Make sure the left side clip (Bottim tab in the video) is centered by sliding it back and forth to find the middle. It will clip right in. You can easily do this from the top of the bike. If one ear doesn't quite fit in, slide the entire filter the other way (Front to back of vice versa) slightly to align it and it will pinch right in with 2 fingers.