I don't think you could even get a 335 without the xenon lights so you probably have those. All you need is a pair of pre-LCI lights, no kit or anything. When I say pair, you order a set and they come with 2 which is all you need.
2007 Monaco Blue E90 335i sport/premium
MHD tune, BMS DCI, Evolution Racewerks CP w/ HKS BOV