if you want to keep the height about the same as the stock trd pro suspension, you could always take the old Bilstein factory shock and match it up next to the new one to see where you want the spring to sit and select that circlip location which i think will be #4/#2 location. thats what i think im going to do when i replace my suspension down the road. what i found out is the springs that come with the 6112s are the same springs the come on the trdp made by eibach and are known for cracking. what i did cause my truck had low miles when my spring broke is i got myself a set of Dobinson C59-748R springs which adds 1 inch to the trdp model making it a total of 2 inches compared to a base 4runner.