I have the road rage 3 which is very similar but in raw stainless, I have mids so cant comment on the fitment in that regard.

As far as power, when properly tuned you will definitely see an improvements (depending on whats on it now) they are a properly designed 2-1 so bottom end torque is amplified and carry's all the way through.

They are loud, but not 2-2 open pipe loud if you get me. Around town they have a deep growl but open it up and everyone with 2km's will know you are around.

Some people don't like the sound on deccel that these pipes give, it's a bit like a truck on the engine brake (but a lot tougher)