Kind of amazing to be that picky on db's (and then only on the bikes). I have Cobra Swepts (with baffles) and have been drowned out by a diesel pickup pullling up next to be at a light. Then when he pulls out (punching it) not only is there a roar that's much louder than my bike, but I'm covered in that smoke that I can't hardly see through and sure can't breath. Just my opinion. As you can see, not a big fan of those pick ups. For those that tow, they are great, for others, not so sure.