you guys kill me. the only way an offroad x pipe can differ is how A - how the pipes form the X, B - how close that cross is to the headers (suppsedly closer is better, I have no proof), C - whether it is stainless steel or not, and D - fitment. If you actually look at pictures, there are tons of X pipes out there that are the same as Bassani for much less dough. 2 pipes are 2 pipes people. If it were catted, it would be different, but all we're talking about is 2 pipes crossed. Personally I've never had a problem with BBK, fit up their just fine. I equate this to buying a Sony deck vs. a Pioneer deck. Same quality, but you pay for the name. This is just my .02 though.
I bet 50% of us would fail the pepsi challenge if there were two cars with the same mods except different x pipes.
A word on mustangexhaust.com - it will give you a good ball park sound but you can't trust it, as not all of the cars have the same modifications, or were recorded the same way. If you put an HCI car with an X pipe on it WILL NOT sound like a stock car with the same X pipe. Similarly if you record the exhaust at the pipes outlet it will sound much "higher" then if you record it a couple feet away and let it breath. (I am an electrical engineering major with a concentration in audio engineering!) Take what you hear with a grain of salt.
sorry for the length!