Are you sure these will fit a  335i? I can't find anywhere where it says the part number referenced  will fit that.
'11 BMW 335i M-Sport Coupe xDrive [LeMans Blue] - Exotics Tuning CF Lip, CF BMW Performance Diffuser, M3 Spoiler, Eibach Springs/Bilstein Shocks, 35% Tint
'07 BMW 335i Coupe
'03 BMW Z4 3.0i