I don't know if this is a modification on the H pipe, but the crossover on my Eldo 1400 has a piece of metal that is a bridge between the sections. (A little piece welded from one tube to another.) Since I don't recall seeing this in pics of the cracked pipes, I would suppose this is a measure they have taken to prevent that from happening. Time will of course tell, but with 4K on the bike right now, so far so good.
John Henry