i would say it added at least almost 2inches of clearence to the bottom of the car

now i used springs spacers that were off a traxxas t-maxx and they were about a 1/4 inch thick so they shoul work good for u too.. now on the front shocks, when you take them apart all i did was hold the spring in my hand and streched them out some, i havent added the spring spacers up front yet..

hope this helps ya, any other questions pm me or email me [email protected]