Anyone running HP manifolds, 2 1/2 h-pipe system, Ultraflows, and 12" resonators in the tailpipes on a 440 b-body (1968)?

I added the tailpipe resonators to my Dynomax Super Turbos years ago because the drone would rattle my teeth. Made a big difference but the turbos are too quiet for my liking.

I did a lot of research on this forum regarding flow and it looks like the ultras are one of the best flowing mufflers. That should help my 440 (515hp) breathe a little better.


Last edited by Siba; 01/24/17 11:07 AM.