Ok Y-pipe w/o cat is 12hp 10 lbs of torq while w/cat its 10hp and 8lbs of torq. Keep in mind this is AT THE WHEELS.
I have never heard Brullen so I can't give you any advice here but everytime I hear the Bassani I nearly wet my pants (Very intimidating!!)
Drone may be an issue but if you want a quiet exhaust you should go with Borla.
As far as I know Bassani gives you 8hp @ the wheels.
These 2 mods do not hurt the performance at all.
