With a good tuner and a good dyno guy you can make shorty loud pipes run awesome. Mine have no baffles or O2 sensors and I gained over 10 horse out of my bike and way loud! PC-V tuner and my dyno guy hooked me up. I have tons of power in all my gears from bottom end to full throttle.
I'm running the Santee LAF pipes. They are loud as f**k. I picked up online, but They don't list them for a sporty, but the soft tails fit right up.
I like that flame that shoots out also.
I'm buying the diesels from sikpipes here shortly and I was curious to what map you run on your 48 with those pipes.
VIEDs Runs fine, does have a little decel pop. Im really not worried about performance. It definitely has more kick than stock but Im sure not as much as some of the performance pipes. I did put some cheap 5 dollar baffles in it which got rid of the raspiness which my ears appreciated
My son will be getting a Hammer 1250 kit for his 883 this winter, he WILL need a tuner for that. I think Ill go in on the power vision 2 bike tuner to dial it in better.