If I just remove the baffle from the stock muffler, will I gain anything. Or will I also need to drill out the opening. I know peopel have gained power form doing both, but I was wondering if removing the baffle alone will realize any gains. I was thinking since the muffler aft opening is smaller than the hole at the end of the baffle, wouldn't that be the limiting facture of how fast the exaust gases escape the muffler. This is the baffle on an OS 91fx, which is basically a cone with a hole at the end of it.

Then again maybe removing the baffle will help with the pressure waves bouncing back more so that it creates more power. I would appreciate if someone could enlighten me as to how the baffle works and also what removing it will do. The baffle is only there to muffle the sound more, correct? Or does the beffle somehow direct the pressure wave out rather than back to the motor. The shape itself seems to me to do just that.