I'm sorry but the high lift A-arms for the EX will not work with the trail without additional parts. They are much longer arms. Yes they will probably bolt up to the frame... but then you wont have an axle long enough to go into the hub, your brake lines will be too short, your shock wont reach the mount, there is no way it will work unless they sell all the other parts with it. MAYBE they make a high lift A-arm kit for the trail as well but there's no way the same A-arms will bolt up to a trail that is meant for an EX and be functional without changing other parts.