In Seatle..Yes, But I am just north of the boarder of you, and the cost difference would be about $1000.
But you are not compairing manifolds to maniforlds. a BB manifold is $150 (where you live) but a 360 manifold is FREE. don't cmpair it to a 340 manifold. apples and orranges Bugs me when someone compairs a 340 to a 440. There are way more 440's than 340's better comparison is 440-360 or something like that.
Just depends on where you live too. depends the costs. BB manifolds up here go for $200-$500
Phil