Not sure exactly what you r asking but yes, borla makes a cat-back. I have it. Not impressed with the sound at all. HP??? don't know, never been dynoed.
I was just curious if borla actually made a cat-back exhaust for the 7th gen. celica. This is the first I've heard of it; no other sites that I've come across sell the borla exhaust.
Well that isn't exactly a rave review.. thanks for the input, though!