Changing a value from the SmoothFollow script OnCollisionEnter

I have a little racing game and in the first part i am driving in a tunnel so the value height from the SmoothFollow Script is equals 1. With the OnCollisionEnter function i want that if i reach this cube with the tag CamChange the value height changes to 5.

 function OnCollisonEnter(hit : Collider)
 {
 
 if(hit==GameObject.FindWithTag("CamChange"))
 
  {
 
  cam1.GetComponent("SmoothFollow").
   }
   
 }

thats what i habe until now after the dot i dont know what to mention help would be pretty nice :)