Tips on exhaust for 3.7 mustang

So I have a 2015 mustang v6, and I’ve been doing some exhaust work and I need some help specifically with how to work out a new downpipe. I’ve already installed new headers and went from the stock 2.25 to a solo performance 2.5 catback. I know i want new downpipes welded without any of those little things that start with c and end with converter but I’m caught between just straight piping it or putting glass packs there. My friend mentioned putting the glass packs in to keep the tone less raspy but putting them just after the headers seems odd to me. Thoughts?