Changed to Bilstein B6 but the car became lower
First time I post a message here. I have a Sportwagon with the V6 engine from 2003. Seeing that I am not the first owner of the car I did not know that my cat had the Nivomat rear shock absorbers. After I changed all the shock absorbers with Bilstein B6 the rear of the car is lowered by 4 cm from its original height. Original height should be 65 cm measured from ground. Apparently the Nivomat springs are softer as well as probably shorter. I did not want to lower the car because my summer tyres are fitted on 18 inch alloys. The question is what springs should I get in order to get back to the original height?