Direction of the pipe might be more efficient on that front but it doesn't mitigate that it DOES help. I can hear cars behind me that are loud and their loud mu

Direction of the pipe might be more efficient on that front but it doesn't mitigate that it DOES help. I can hear cars behind me that are loud and their loud mufflers are pointing back too. You might never have 'bought' the argument but direction of the pipe doesn't take away from the fact that MOST people DO hear them as they begin to pass you. Except when they zip through going illegal mph. That's something that...baffles me. Why zip through WITH loud mufflers. They don't seem to be too bright but...fate comes for those cyclists fairly quickly.