I tried changing out brakes and rotors a while back and for the life of me, i couldnt break the bolts holding the caliper bracket on. I only jacked the car up a little off the ground so i didnt have much room to work with using a larger breaker bar. Looking for a tip if there is one.

Thanks

 

Dead blow hammer has worked for me in the past. Or jack it up enough to get a longer breaker bar.

 

Longer bar and/or impact wrench.