Its fairly self evident once you get under there. The kit contains new bushes, bolt, nut, washers etc. Just undo the old nut and draw out the old bits. Be warned that the nut is usually torqued to some ridiculous torque, so the only difficulty is usually getting enough leverage on the breaker bar to loosen it. I'm not sure what the actual torque spec is, I dont have my references here with me at work.