I need to get an impact fitting to remove the caliper bolts. It appears to be @ a 55 torx. These are '03 stock front calipers. Can someone tell me the correct size? Also any tips to ease the job would be appreciated.

 

I think it is a T55.

 

Make sure that the torx socket it completely seated in the bolt head before you break it loose, or you will either twist the tool or strip the bolt head...happens real easily with torx...and break it loose by hand, then run it off with the gun if using air. My buddy stripped out my T55 Torx that way when we did his brakes, luckily I had a backup.