Rear Suspension Kit For 15" Conversion KitBMR Suspension has taken the guesswork out of making huge launch improvements to the 2008 2009 G8, and put it all in one convenient kit. Countless hours of design, engineering, and track testing gives you the best combination of parts for remarkable traction and launch consistency on the street and track. Matching specific components and improving suspension geometry provides you with an incredible blend of performance and drivability. This is the