i was trying to install the new rotors. the front calipur bracket bolts are so hard to remove. i even try some WD40 but still no help. i even spend my whole body energy to remove them...

Any technique to remove those bolts??

 

Breaker bar and PB Blaster.

 

I had the same problem...I used PB Blaster that didn't work so I used a craftman socket wrench and craftsmen adjustable wrench and attached on to the end, essentially creating a bar about 2 to 3 ft long...a little muscle and that should be more than enough torque to get it moving...watch your knuckles or they'll be bleeding when you literally punch the ground getting it loose..

 

impact wrench does wonders too