Ive never read that its a good idea to use stock shocks with any lowering springs.
Besides, even if you did it would be ok for a while.... until your stock shocks blow out quicker than usual. then you would have to replace them, as I said. thus spending two install prices vs the one.
youll save money in the long run. just my 2 cents. plus, your ride quality will be better with the koni shocks vs stock shocks. a lot better.
2006 330i |premium package | Sports package | BMS Power Box | AA Tune | K&N Drop in | Charcoal Delete | Mforce Design Air Scoops | MMW CS Exhaust w/ second cat delete | Resonator Delete | Eibach Pro-kit | Koni Yellows | Mtec fogs | Mtec v2 Angel eyes | M3 Tri-stitched steering wheel | BMW Strut Bar | 19" Avant Garde M310's | Cooper Zeon 2xs | OEM Blacklines | WTB: Dinan High Flow Throttle Body