Interesting ... most likely they will do great in FP true dual sharktails.
I installed rush true duals on my 17 Springfield. Barking was very loud. Installed Vance and Hines mini baffles with fiberglass wrapped. 1&1/2 inch diameter. Slipped into stock mufflers beautifully. No more barking. Sounds great to me. Very relaxing without the racket.Talking about the Quiet-Riot Exhaust Baffle made by Rocky Mountain Performance.
I'd like to hear your thoughts on these. https://rocky-mountain-performance.com/quiet-riot-exhaust-baffle