Bilstein B16 2011 BMW 1 Series M Base Front and Rear Performance Suspension SystemBilstein B16 (PSS10) suspension kits feature ride height adjustability with 10 stage manually adjustable dampers in an OE quality, direct fit package. The 10 stage damping system adjusts both rebound and compression with each click to provide the best handling performance in any condition. These kits offer monotube performance dampers with matched springs that are tuned for each specific application. The zinc coated and threaded body design will give