Sorry I dont understand, this is a Full Hayward & Scott Stainless Exhaust and the only part that isn't Stainless is the U clamps,rubber mounts and Front Turbo clamp.
if you are looking at the colour of the pipe ? this is due to the thickness of the pipe and the head that go's in to it. I can quite surely say that YES this is a Full stainless pipe. you could pollish the hole Exhaust if you felt that way inclined. I have shown this in the pic's on the joint's. Many thanks Paul W