The anti lift kit is actually a Castor correction kit. It counter acts the Kingpin Inclination since the strut HAS to be at an angle to the hub for packaging reasons ie brakes. The distance between the centreline of the wheel and the kingpin axis is called the "Scrub radius" which we want to be as close to 0 as possible especially in a front wheel drive car because it reduces torque steer. However for those that decide to put spacers on the hub because they are trying to fit wide wheels for stance, you actually increase the scrub radius since the wheel is being pushed further away and the distance between the centreline of the wheel and the kingpin axis gets greater and you will actually make the car handle worse, along with looking shit imo. The main reason for increasing castor is to reduce the adverse changes in camber, ie the positive camber which we don't want. Generally if there is 4 degrees of kingpin inclination then you would counteract that with 4 degrees of castor.