Hi. Just bought a set of lowering springs and not sure how to change these, I have changed complete coilovers on my golf and bmw but never only springs.
Thanks guys

Here's how to for the rears but for the fronts is gone.
http://www.fiatcoupeclub.org/forum/ubbthreads.php?ubb=showflat&Number=214954&page=1#Post214954

For the front, loosen the strut nut in the top mount, jack up the car, remove wheel, use two decent spring compressors to compress the spring, undo the two bolts connecting the strut to the hub, remove bolts for the top mount and you got the whole strut with the spring out. Then carefully dismantle the top mount (be very careful as last thing you want is the spring launching at yourself), bearing and spring seat, fit new springs. Then the whole process in reverse. Make sure you tighten the strut nut having the car on the ground. You may need an air gun for that nut either to remove it or to tighten it. I used mole grips instead thou. Also, I find it easier when track rod ends are removed then the ARB will sway much more which can help in setting the strut back in its place.

I think that you should shorten the bump stop by a half?

PS I would replace the top mounts and bearings at the same time.

Thanks for that. This is going to be fun.
what do you mean by shortening the bump stop by half?
Thanks again.

No need for spring compressors until the struts are off the car.
The rubber bump stops are a bit too long when using the Bilstein shocks + lowering springs. The car often rest on those rubbers unless you cut - preferably - the first "ring" off the rubber stop.
A lot less crashy ride!

I did the front. When I took the old ones of they were both snapped at the bottom. Weird. Now just the back tomorrow.

Do you cut the front and rear bump stops down ?

I guess he meant the fronts. I only did the fronts on mine any have never bottomed out front or rear.

Actually I think I cut the rears a bit as well.