Quote: That's similar to the one like I bought from you, wasn't it Brad? The one Roger (Dr Air) Ported? Except that one was a 4150 flange.
Yep, that's how I recognized it as not being a 337.
The RB Stage VI intake has that same extreme taper from the runner entry down to the head opening, too. I think on a 500-ish (+) combination it helps the mid-to-top, but on a 450-ish like I dynoed it on, it had a big hole in the curve under the torque peak (but it did make a lot of HP up top).
