ok the N1 exhaust rear-section looks similar to this:
Yes its only HALF of the cat-back. it wont bolt to the factory exhaust, and it needs a mid section made up.
Everyone knows what a scotty dump pipe looks like, Ill take a pic of the kakimoto front pipe on the weekend.
However, it runs from the back of the dump pipe to where the cat-back exhaust would bolt on, also taking the position of the cat. thus a de-cat pipe.
hope that helps everyone!