I got a couple slip-on mufflers along with header pipes w/out crossover for my 96 FLSTC on eBay. However, after looking at the mufflers closer I see that the numbers are different. One is 80048-95r and the other is 80048-95af. I know the af one is a screamin eagle one, but I'm confused about the other one. If it isn't a screamin eagle pipe is there any harm mixing the two?