Damage using straight pipes?
I had asked this question before and couldn't recall the answer. My buddy just removed the entire muffler from his '07 GSXR 750 and replaced it with a straight pipe. I had seen one other guy do this and asked on the forum what damage this could potentially cause to the engine. (aside from voiding any warranty!) I have tried to tell him this was a bad idea and he just keeps asking why. He loves the sound and insists it has more torque. Any truth to this? He basically wanted more noise without dropping the $550 for a slip on.