Used 2-1/8" ID exhaust pipe. Cut 2 pieces to make a 45. Welded them together cut a new back plate for the air cleaner welded it to the pipes. Then notched the pipe so the clamp would compress it on the carb.

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2005 Speedmaster No air box, uni filters, 157 mains, 45 pilots, thumb screws, wrapped headers, open shorty pipes, bobbed rear fender,