Bilstein B16 (PSS9) Suspension Shock Absorber for 2002-2005 Porsche 911Bilstein B16 (PSS9) Dampers for the 2002 2005 Porsche 911 feature ride height adjustability with 9 stage manual damping adjustment in an OE quality, direct fit package. The 9 stage damping system adjusts both rebound and compression with each click to provide the best handling performance in any condition. These monotube performance Dampers are tuned for each specific application. The zinc coated and threaded body design will give you the flexibility