Check out your frame where the shock bolts up to main part of the frame. You will see a piece like i have pictured below. If it says on it "348mm BB height/ 68.5 head angle (low BB)" on it, you have the slack on in there. If it says "high bb" with different numbers on it, then you have the shock shuttle on it. If have the high one, and you need the low one, i have one here from my old enduro.