is it even worth the cost difference

sonic370

Sounds like a toss up. Some yes some no.
like one poster said my choice.

from what i've read on here and other forums its not worth the 150.00

6spd

i got mine from the 370z store for around $80.

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Zsteve

ditto and you will not feel the difference in power but you might notice a slightly better throttle response. But I tested my K&Ns drop ins with my Cobb AP and the intake temps were 7-8 degrees over ambient temps and they flowed 400 G/S each at WOT. I didnt have the Cobb befoer I did the filters so I dont know what the stocks did. Maybe someone with a cobb might still have stock intakes and can measure them. I dont have my stock filters anymore. From what I gave read the long tube intakes give you some gains as they lean out the car but when you get a tune it puts the A/F mixture back into its best range and I would bet that a tune with and without long tube filters would be about the same, and probably the K&N drop ins would be in the same range too. So no tune long tubes, a tune stock with higher flowing filters.

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2010 LS3 C6 Silver coupe corvette