I would to hear so input on what muffler others have run on gen 10 f series with 4.6 or 5.4s. I have now true duals with 12inch long dynomax race bullet mufflers and its getting annoying to me . I liked them at first but they are so loud it drowns out my two 12inch mtx subs that I have it might as well be strait piped. I also have cut off the rear two cats. I have been looking at flowsounds they are cheap and have a chambered sound wich I like but I will say I do like the strait open sound the bullets have. Just was wandering what others have had good luck with.