Word of advice with Bilstein Dampers, the gas pressure is higher than in the OE dampers.
I fitted Bilstein B6 Front and Rear Dampers to my Mk4 Ibiza Fr with OE springs in the first place, the result was an increase in rideheight of 25-30mm. So I then fitted 30mm Lowering springs just to achieve standard ride height, they do give superb handling though .