If you actually get those things to work, you're going to end up replacing your shocks and struts quicker then you normally would. That, and the ride quality is going to be garbage. You want adjustable height and possibly dampening and rebound..get a full coilover setup.
2009 E92 335i Alpine White/Coral Red
2007 E92 335i Sparkling Graphite/Black
2000 E46 323i Steel Blue/Grey