If it's any help I am running the 270's and had them ported by Larry Smith at flow2tech. They flowed 278@.700 on his bench and 284 on my local builders bench. The same bench flowed my 240's at a smidge under trick flows rated flow (330@.700 I think it was).
I can't speak to how well they perform yet as I am still dialing in the tune and haven't had them to the track yet. I can attest to the quality of the manufacturing though. And I can also say that the quality of customer service from trick flow is head and shoulders above what you will ever get from Indy. They were cool enough to swap out my 240's for the 270's 6 months after I had purchased the 240's and didn't even charge me a restocking fee despite the fact I had purchased them through a different distributor. Pretty solid customer service if you ask me.