I've got ST springs and am running Bilstein 1104/0929. Some places will try and sell you the heavy duty shock for the rear but you need the sport shock. Personally I would have gone with Koni's but they are really expensive, but they do have a lifetime warranty and the fronts are adjustable. Not to step on your toes Jimmer, but shox.com is where I got mine. The second pic in my sig is during shock/spirng install.