BILSTEIN Performance Suspension Kits - DampTronic Complete Kit 49-135817 Damper Weight: 56 Fitment: PORSCHE 2006 - 2012 911 CARRERA 4 Position: Front and Rear 2006 - 2012 911 CARRERA 4S Position: Front and Rear 2007 - 2012 911 TARGA 4 Position: Front and Rear 2007 - 2012 911 TARGA 4S Position: Front and Rear 2007 - 2012 911 TURBO Position: Front and Rear 2011 - 2012 911 TURBO S Position: Front and Rear 2012 - 2012 911 CARRERA 4 GTS Position: Front and Rear