[Our03z4]

Sorry to ask this because I'm sure it's somewhere but after an hour of searching I still can't find the answer. What shocks/struts are on the 2003 z4 2.5 with the sport package? Looks like either the B6 or B8? Looked like I have B4s on my car now but not 100% sure. Also what springs to use? Thanks so much for any help or advice!!!