Being used to quite hard sprung cars I opted to put a set of lower and harder Eibach springs on the C1.

To install, start by removing the nut from the wiper arm.

Then remove the wiper arm. To get it off the spline I had to use a pulley.

Pop off the other part of the arm and you should be able to remove it.

Remove the strip from the edge of the board.

Remove any bolts and lift the board.

Disconnect the small hose.

You should now see the wiper motor installation. Remove the plug and the bolts.

Remove any bolts from the iron plate to loosen it.

You should now have a bit of a pile of parts :)

Now we can jack up the car

and remove the wheel.

Now we need to remove the nut on top of the suspension strut. This can be a very annoying process. If you're lucky it will come loose without a problem. On the other hand, we had to saw one to bits to get it off :(

The dish can now be removed, feeing up the strut. Remember to place the nut back.

To free up the strut on the lower part, the bolt that holds the clamp in place needs to be removed.

It will probably not really move, so you need to get some space in the clamp.

To be able to remove the hub, the anti rollbar needs to be loosened.

It is best to support the hub, we use a small jack for this.

With everything as loose as possible you should be able to get some spring compressors in place. This will take some juggling but it should be possible. Gently try to get the strut out.

To disassemble the strut put it on a worktop.

Remove the nut.

Now remove all the other parts.

And remove the spring.

Gently and carefully remove the spring compressor from the spring. Now we can start bulding up again. Compare the old to the new spring.

Put the new spring on the strut.

And start putting all the parts back (in the right order).

Put the spring compressors back on and we are ready to put the strut back on the car.
Spread the clamp with something (we used an inbus key).

And persuade the strut to go back in.

And basically reassemble everything.

One important tip: put some tectyl on the nut to prevent it from rusting again!

The other side of the car is the same idea.

Now we can start the rear of the car. That is a lot simpler. Jack up the rear of the car.

And remove the wheel.

Put a jack under the hub.

Remove the lower bolt that holds the shockdamper in place.

Lower the jack carefully and you should be able to remove the spring.

Again, the height difference is quite obvious.

Place the new spring under the car.

Use the jack to align the hub and shockdamper and put the bolt back in.

Now do the same on the other side of the car, and you're done :)

I found the car can corner with higher speed and has more grip. The ride is slightly harsher, but not extreme. A very good mod in my opinion, especially with some wider tires :)