Welcome to the site....
I bought a set of those slip ons from Xchoppers new in the box from a guy off craigslist, I was not impressed, at first i liked them because they were louder, but the sound quality wore on me really quick, as did the look, they just looked goofy on my retro, I put my stock pipes back on and drilled them out to make them sound better (clayton mod), still wasn't happy with the quality of sound though, got a set of Cobra speedster longs and they are awesome, sound is subjective to who is listening to it, but I would suggest going to a meet and greet and hearing someother pipes before you buy those.
