H pipes??

[2002ChevyCamaroV6]

Hey guys, I am looking online at different exhaust setup,s for me 3.8l and i found a youtube video of someones with a 2.5'' H pipe and borla xr-1 muffler(s) that i really like. But i have no clue what he means by an H pipe.? I assume its a piping shaped as an H but whats the point or purpose? Where on the exhaust does it go? Between the cat and mufflers? Sorry for all the questions, im newer with exhausts so i could use the advice. Thanks

[craby]

h pipe is used to connect the two pipes when using a true duel exhaust.