You may have issues if you have the older style rear brace. The old brace has only one set of peg slots in it. The new one has 3 sets and is longer to accomodate longer truggies. If you have the new one it will drop right in. If you have the old one you will have to grind the peg off of the bottom of the brace so it can slide further back. Once you do this you just take the screw that holds the top down and go through the rear brace and into the post switch. Then you put the front screw in normally. I would also reccomend centering the wheel for the losi's. It's very simple to do and works much better with the losi. Just remove all 3 screws that hold the motor mont in from the bottom. Slide the mount so the wheel is more centered, and screw the mount back in into the option holes in the mount. Very simple process. Box works great on pretty much every car.