That tank was about a grand and it is not plug and play. Notice that the emissions lines are different. If you're trying to stay OBDII compliant, you may have a hard time keeping the evap system happy with it. I dunno. As it is, we'll have to weld a titty to the filler neck (just like the euro spec and cup cars cars) to run the vent line to so the system can breath during fill up.
A nice unit for sure, but probably not for everyone...
I'm sure dark will take many pics and weigh every fitting to get the precise weight savings
TP