[1Pirate]

As a follow up when I was packing up my OEM springs last night I noticed that the 2009 M Sport rear springs are visually different than the 2011 M Sport rear springs I just installed on the car. Unfortunately I didn't take pictures of the 2011 springs before installing them so I could post comparison pictures. The spring coils on both ends of the 2009 springs are spaced further apart than the middle of the spring whereas on the 2011 springs the spacing is the same over the entire length of the spring. This appears to me to be consistent with the 2009 springs being progressive and the 2011 springs being linear.