M1

  Original Equipment Quality

  Gas-Pressure Technology

  Monotube technology

  Twin-tube technology

  Round threads

  Triple-C-Technology^®

  Threaded body adjustable range

  Air suspension

  1-way adjustment

  2-way adjustment

  Road-Tested by BILSTEIN

  Zinc coating

  Swivel reservoir

  Lifting & fits lift kits

  Lowering & fits lowering springs

  DampMatic^®

  DampTronic^®

  ridecontrol^®

  iRC^®