Blitz Nurspec Type R 93+ RX-7
 

Is this a catback with maximum flow but still a deep not to loud sound compare to HKS ect?.... if HP is a goal with bnr twins will this catback have somtheing to say compare to the racing beat dual catback?

It's loud, very loud. There is an exhaust buyer's guide in this section, search for it ;)

It is loud and tinny. It has a much higher tone than the HKS Hiper/Carbon Ti.

i've had this on my first fd and i loved it. it's loud but great flow with twins
now on my 2nd fd i have bought the same one but now for single turbo

I currently have it. Very loud, at idle as well.
Exhaust note is full and not "shallow" like some others.