You can take the 2 bolts that hold the strut to the steering knuckle, widen the two bolt holes with a grinding tool, and take the car to a mechanic for wheel alignment. Be sure to ask the mechanic to set the camber angle you specify, otherwise he will just set camber to OEM specs.
If you don't want to do that, you can buy camber adjustment bolts.
If you don't want to do that, you can buy camber adjustment bolts.