I have the cams... as to breaking belts... like hondatech said. Run the risk either way.
Power delivery is mainly high end. 3.5k and up, the difference is very noticable, and the engine is much smoother at high rpms than before. Basically the way the car should have been cammed in the first place. If you are looking for more midrange torque the Brullen header might be your best bet.