The Speed Kit 3 is the ultimate in performance for your 2010+ Camaro. These are the same parts that the Detroit Speed, Inc. 2012 White Monster Camaro ran during the One Lap of America where the team were named Rookies of the Year. For the ultimate track kit for your Camaro, choose the Speed Kit 3.Front Spring Rate: 250lbs/inFront Spring Free Length: 8inRear Spring Rate: 450lbs/inRear Spring Free Length: 8in