I test rode a Valkyrie (2014) yesterday for shits. I suspect the advertised "meaner" exhaust note from this F6 will most likely be similar to, if not the same as the 6 into 6 pipes on the Valk. Slightly cooler exhaust note than my 2013 F6 stocks, but probably not as good as aftermarket if you're really wanting mean.

BTW, the Valk test run was fun. Fast bike! Felt much less bulky than the F6, but WOW life sucks at 50+ mph without wind protection! Pretty bike (despite the funky radiator shoulders) but not really functional for me.