After i put my 275/50 mickey thomsons on everytime i brake hard i hear a thumping noise like if something metal is hitting other metal. Im not sure but i think the tires raised the rear of my car enough for my driveshaft to hit my borla. Also when i go over bump fast enough i also hear it has anyone had this problem before.

 

How hard? It could be brake hop, it's like wheel hop but when you are on the brakes hard. Most of us who roadrace or autocross have dealt with it at some point or another. It's just something these cars can do when running really sticky tires (if that's what it is).

 

The harder i hit the brakes the louder it gets but i also hear it if im going over a bump without hitting the brakes but its not as loud. if its brake hop how can i fix this problem.