This is what you need:
http://www.saxperience.com/forum/sho...d.php?t=108157
When I did mine I NEEDED (tried a smaller one first got no where) 14lbs Sledge hammer, a 20mm iirc steel bar. Hit it hard and they will come out. The top torsion bar (hitting from the drivers side) was the hardest the bottom bar was a lot easier to get out.