I like that. looks like he's made them to a tuned length too.
Might have a go at something like that out of Stainless mandrel bends one rainy day next winter.
They're time consuming making them out of bought bends, but the end result and personal satisfaction is worth the reward.
Made a set of custom pipes for my T120 many years ago and also did a set of 3:1 pipes that came out the left and over the primary on my T160 a few years back as well.
Bought a TIG about 12 months ago and have hardly used it since. Might as well use up some of that gas bottle I'm paying rental on.