Parts were on a N54 135i but can fit the E90
- Sachs performance coilovers ($1500)
- Visnu Procede piggyback V5 Rev 2 ($500)
- Forge motorsport DV valves in black ($200)
- Cobb AP ($750)
Sachs coilovers are height adjustable and rebound adjustable and are upside down strut type (ie like Bilsteins so you can adjust from below thus much easier than KW's)
Purchased locally from 888 racing (V8 racing team) for $3.3k only <10,000km ago and have been great!