From Faq
Here's how we installed my 4crawler 3" on my 03 Xcab Prerunner (sorry no pics, it was raining all day):
We started with the bed, because it was going to be easier.
Open your gas door and remove the 4 screws holding the plastic "cup" in place. Pull up on the cup and it'll come off of the filler neck.
If you have the tow package, remove it as it's difficult to get at the rear most bed bolts with it in place. After removing it, you'll need a 17mm socket and ratchet along with about two 6" extensions. Put the extensions through the hole in the frame and then attach the socket from inside the frame rail. A cheater bar or a good aircompressor/tools will make the task much easier.
Remove the rear mud flaps for better access to the 2nd bolt behind the wheel wells. Still a 17mm socket. The front most bed bolt is the easiest to get at, cheater bar etc still may be useful.
We had two people to lift up on the bed and two people sliding the pucks into place. The bed is light and a hilift jack isn't really necessary unless you're doing it by yourself.
Gather your bolts and start them in their holes to keep the pucks in place. Move onto the other side and repeat. Bed is done for now.
Open the doors to the cab, remove the door sill plate and kick panel. Pull back the carpet to get at the body mount locations(looks like a plastic freeze plug). You can get to the rear ones through the storage compartments in the back floor. You'll want two people for this part, one to hold the bolt head at the top and one to loosen the nut at the bottom. These were 14mm I believe.
Next move onto the radiator/fender supports. Remove the front bumper. Two 17mm bolts per side. Disconnect the turn signal wires before you remove the bolts. Now's a good time to remove the bumper to gain access to the nut on top of the mounts. You'll need to do it later anyway, and you'll kick yourself for not removing it after you realize how much easier it woulda have been removing those bolts.
Before lifting up the cab/fenders go ahead and disconnect the steering shaft. Many people had trouble with it, but on mine it was no more difficult than the rest. Also, there are two small nuts holding the front bumper to the fenders, remove those or else you're not going to get too far. Go ahead and remove the lower radiator shroud, it has some clips on it and they just pop off. If you don't remove them, the shroud will pop off as you start lifting the body. It didn't hurt mine, but that's not saying it won't damage yours.
We placed a floor jack on a good solid pallet. Using a 4x4 and 2x4s as needed to buffer the jack against the body, we lifted it up far enough to get the pucks in and started finger tight.
Move to the other side of the truck and repeat the process. There's a reson you left all the bolts finger tight from the beginning; make sure your body lines match up, if they don't adjust them then tighten all the bolts down.
This is as far as we got before it got dark, I'll finish the writeup after everything is finished up.
