Ive had both on my Speedy... she was bone stock when I got her, and remained stock in the exhaust dept. for probably 2-3 years into my ownership. I fought tooth and nail against the derision of my peers to keep her that way (despite the Singer sewing machine references) until gettin a lil buzzed one night and giving in to a friends suggestion to "take off the mufflers and take her up the road", at which point i had to make her loud. now with a few years on 17" straight pipes with unpacked baffles, i gotta say... i'm changin her again. got some pipe from Jegs and i'm gonna try to build a 2 into 1... loose some obnoxious and gain some backpressure... maybe wrap em to keep things cool... started out as an answer to some melted bike cover on the header, but the more i think about it, i really don't need them any louder than absolutely necessary to keep her performance up.