My dad has been riding most of his life, and I have most of mine. Both of us have noticed that the "loud pipes save lives" slogan is a farce. If a driver is tuning out they will not notice your exhaust. If a driver is on their phone it won't make a difference.

The trick is to ride defensively and wear a helmet. There's a reason neither me nor my dad got into a serious accident get, its because we believe every car is out to get us, not that "if I'm loud and obnoxious they'll notice me"