No loss no gain, but definitely more noise than just engine.
May experiment with a Hotdog Resonator and will be going 2.25''/2.5'' from Cat back in a month or so.
Got to pop into the exhaust place this week so I will get the name of the mufflers.
My mate has a 08 SX6 and he had the same done, sounds great. His old mufflers were starting to peel away on top where the join is so it wasn't a loss doing it.