Thrustyjust said:
Cool stuff. Where did you get them from ? Contemplating doing mine in the not too distant future with B4's
I was going to get them from the link that patriot66 posted but being Scottish always want a bargain

. Ended up getting:-
Front driver - https://www.ebay.co.uk/itm/1x-BILSTEIN-Front-Shock-Absorber-For-BMW-Z4-22-164575/192874499712?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Front passenger - https://www.ebay.co.uk/itm/1x-BILSTEIN-Front-Shock-Absorber-For-BMW-Z4-22-164568/312551224677?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Rears - https://www.ebay.co.uk/itm/2x-BILSTEIN-b4-Rear-Shock-Absorber-BMW-Z4-E85-for-Standardfahrwerk/332452482771?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Saved about £20 on the combined package but I see mister-auto-uk has increased his prices so you might only save a tenner now.
mister-auto-uk also checked the VIN number to make sure that the parts were the right ones for the car.
You will also need top mounts- I used https://www.ebay.co.uk/itm/FOR-BMW-Z-SERIES-Z4-E85-FRONT-REAR-TOP-STRUT-MOUNTING-MOUNTS-HEAVY-DUTY-NEW/163625870593?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649.
If I knew before i started what I found when I was dismantling the rears - I would have replaced the bumpstops too but I have just reused the existing. Might change them out in the next few months.
A friend lent me an access socket set that allowed me to take off the top bolts on the front while using an allen key to hold the spindle. Some guides say you can use a spark plug socket but this kit was useful because the top nut on the existing was 21mm with a 6mm allen key needed in the spindle but the new B4s had a 22mm nut and the allen key socket was 7mm. Not sure if you would have a 21 and 22mm spark plug socket.