try a search "harley mufflers" or "harley slip ons" the sportster slip ons are louder than the road kings as im told as soon as i get the road kings on my 1200 im gonna try and do a video on youtube this will be in a few weeks i hope
heres a link to listen its kinda hard but here it is
I have vxt1300 pipes and mufflers on my bike. Took a little bit of enginnering and a welder[a good friend]. After they were installed I drilled 6 holes in the end and came out with a good sound. NO rejetting needed,mileage is still the same, 40 mpg. Baffels are still in place also.