Headtube angle adjusting headset from FSA In the box options for plus or min 1.0 degree head angle change T-Kit fits Tapered heatubes with 44mm top insertion and 49.57mm bottom insertion for 1 1/8" steerers only FSA Part number 102-0011 Not sure if this is the one you need? Check out the handy FSA Headset ID Tool here http://www.fsaeasyheadset.com/