I found that after already having StainTune mufflers (not quiet as harsh a sound as TORS but with a larger OD baffle) and was happy with the sound level, I then got the CES headers with a custom reverse collector out to The three mufflers it actually raised the volume a bit especially if I went WOT this is possibly due to the very low restriction of the reverse collector, so what I am saying is get yourself some free flowing headers with a custom crossover pipe and it will raise the volume.
You won't find any stocking headers that are any good, and if you want loud go for something like the Carpenter three in to one brutes, not my cup of tea but bloody loud