AC Schnitzer 31312225489 lowering springs for F30 and F31 chassis - not a generic 'BMW 3 Series' part. These are the real deal: developed alongside AC Schnitzer’s own F30 race cars, tuned for B48 and B58 engines, and proven on track days from Silverstone to Hockenheim.
F30 Saloon / F31 Touring only - no fitment claims for F34, F35 or G20
Drop: ~15 mm front / ~20 mm rear on M Sport sDrive; ~20 mm front / ~25 mm rear on xDrive or SE
Works with adaptive suspension (EDC) and xDrive - no coding, no spacers, no compromise
Stage 1 fast road spec: stiffer than OEM, compliant enough for UK A-roads, sharp enough for Castle Combe or Oulton Park
Search terms covered: F30 lowering springs, F31 sport springs, B58 lowering kit, B48 fast road springs, xDrive lowering springs, F30 track day suspension, 320i stage 1, 330d lowering
