Samurai_Blue
Yolo Whippin'
i have no idea what you are talking about then because the progress and godspeed coilover and the function form and all other suspension companies use perches on which the spring rests on. you screw the perch down to lower it which shortens the overall height of the coilover when its on the ground causing your car to be lowered. this shortens the shock travel within the coilover. Its better on a full coilover than a coilover sleeve as struts are not made to be lowered that much.