lacroupade said:
Yes they are....just need the right 12-point (I think) torx driver. Just take care not to strip or damage the bolts as they are hard to replace.
Not quite the same as a Torx but as Lacroupade says its a 12 point Spline tool to remove the bolts. Fairly certain this is the one I got from E bay sometime ago:
http://www.ebay.co.uk/itm/M8-XZN-12-Point-Spline-1-2-0-5-inch-drive-bit-TOOLS-/120607191844?pt=UK_Car_Accessories_Car_Care_Cleaning&hash=item1c14bfb324
If you do it yourself be careful and use an extension bar on the socket rather than a socket wrench to give you good leverage. I have a limited supply of new replacement bolts......... .