You will need a torx bit. Just take one of the bolts that come in the kit to Sears or any other place and buy a torx bit that fits.
Also, if you have a 17 mm and 19 mm closed end wrench (not the one with the open end) (i don't know the technical name for it), it will come in extreeeeeeeeeeemy handy in places where there isn't much room for a socket to fit.
And a breaker bar comes in handy too.
Also, make sure you have the rear axle level before you torque all the bolts down.