[valenciacarrera]

Bilsteins are gas charged. Which means they will extend all the way back. Depending on front weight of your vehicle, you might want to lower front end a bit since, Bilsteins gas pressure is higher than Boge spec. I would also suggest replace rears with same brand at the same time. It's just easier to do corner balance and alignment after replacing all four. Besides, you might not like the ride if rears are in same condition as fronts.