04 and up with 4.4or4.8 have front and rear air. 99-03 had rear air on 4.4 and almost every 3.0 has front and rear springs. Richi rich has a 3.0 and so does mrbmwx5. They have lowered there's. I prefer front and rear air because of the ride heightt settings.

__________________
2001 X5 4.4i WHITE-Loaded like a baby's diaper SOLD