Borla now sells 2 hpipes. A longer one that directly replaces the stock resonator.
Then they sell a shorter one that is a direct fit for replacing the xpipe that comes with borla catback systems.
https://www.borla.com/products/h-pipe/catalog/
Borla now sells H-pipes directly.
One for direct fitment on their catback systems and another that is a direct replacment for the stock resonator: https://www.borla.com/products/h-pipe/catalog/