The Vanke modded Indy DP is what I run on my 540. I ran it and the Indy SP back to back on the engine dyno during break-in. The DP lost 11hp at 6,800 compared to the SP, but picked up over 30lbs of torque down low. That was on MP/Eddy heads ported by MCH.

I asked Russ at the Indy booth for a recommendation on which intake for my combo. When he strongly recommended the Vanke DP, I was very skeptical based on my experience with wedges. I thought maybe he just needed rid of excess DPs. So I bought both the single and the dual planes. I also had a Barton, but since it wasn't going to fit under my Shaker, I didn't bother spending the dyno time to try it. We expected the DP to win down low, but were very surprised at how well it hung with the SP up top. I suspect that a little time with a grinder would have brought it right up to the SP.

With the ThumperDart modified 1050, the big Hemi drives like a wedge. Good street manners and very responsive.