340 on dyno video, whats your opinion

We don't know if they're using STD or SAE correction factors either.. You can get very different numbers on the same engine, the same day, just by changing the correction factor.
And, of coarse, they didn't say. maybe this is why they didn't show the top of the page at 9:52 minutes in the video. (where the correction factor would have been listed)

And as Dano aptly stated, better than OEM bolts on's in place..