All you've got to do is buy some spring compressors (£20 halfords) to take the springs out, then unscrew the adjuster cup out then replace the spring. I took the wheel off to do it and used a 20mm socket and a spanner. Its not hard but it might take u a while depending on your mechanical knowledge. Took me quite a while especially on the drivers side.......fookin fuel tank stuff!! Once its done it should lower your car about 5mm, making it the right ride height compared to the front! You will hate your car by the end of it