When I needed a set of new header pipes, couldn’t find anyone with correct radius bender to make them. Solution was to make two small bends with a straight section, so two backpressure points. Inceased backpressure and it ran and sounded better.
B-Cozz
Welcome to the “road to nowhere”
2 bends are better to combat flow reversion. Ask Honda.
Honestly I’d recommend header pipes such as these, after 20 years it sounded more like a helicopter!