any special tools i might need to do this myself? i heard i need a torx screwdriver, what size do i need?

 

the whole brake? or you mean the pads?
If its just the pads, you only need a 12mm socket.

I just changed my rear rotor/pads last weekend.

but either way, no torx bit needed.

 

12mm wrench and c clamp to sqeeze caliper piston back. thatz it

 

yeah, sorry. meant just the pads. don't have a c-clamp though

 

in addition to the socket wrench and the c clamp, I needed two other tools to do it:
1) crescent wrench to keep the inside bolt in place while I broke loose the bolt on the outside of the caliper, and
2) a copper tube extension to help me break loose the bolt!