Unique alright.
Equal length does not always mean better performance. Since the exhaust will slow down every time it changes directions the length would not need to be equal in order to equate equal flow and back pressure for each bank.
4 seperate "tuners" found a 180 degree bend to be the ideal point. Ford back when they designed it, Mazda for their (New model - 6?) 3L HE, MSDSInc for their tuned headers (dyno tested), and CTA in dyno testing.
Now they may not have the ideal point, but it's odd they would all come to the same conclusion then...
Now perhaps if you throw a custom chip in the mix???
2000SVTFlyboy -
Any Y-pipe without a cat will be susceptible to drone & rasp. Not to mention you ARE NOT running a resonator. Which is used to control drone & rasp!!!