yes you need spacers to put the stem on your fork. specializes also has there own top cap.
your stem should look like this
http://www.ebay.com/itm/Specialized-...item3f2697fec8
if you look at the cap you can see the hole is slotted to adjust for different angles. they also sell caps that have a non slotted hole and the bottom is ground on a eccentric to compensate for the angles.

they also sell different angle spacers.
i myself have a 30* spacer in my bike.

http://www.ebay.com/itm/Specialized-...item3383407784

http://www.ebay.com/itm/SPECIALIZED-...item5d40d54fa5

if you keep checking ebay they show up often.