N1 cars in Japan have their piping run down the middle of the car and then angled out to the exhaust cutout in the bumper. If you don't want to worry about scraping your piping, you can run it like a normal exhaust, and ad some bends after the LCA to get the piping in toward the center, and then have the muffler angle outward toward the exhaust cutout. Or, just run the piping like a normal exhaust and you should be able to angle the muffler some, but not as much as a "true" N1 car.