That's what I've understood. IIRC someone was talking about doing a before and after dyno run to try and get some hard numbers, but not sure if/when that'll happen.
I didn't have an opportunity to get a ride in Russ's truck last time he was down here, but I've heard from others that the difference is VERY impressive. I
really want to put one in, but given that other than a few top-end things I don't really need to do much on my engine in my upcoming project, I'm not sure I can justify tearing it so far down...OTOH since I have to pull the turbo anyways, it's not
that much more to get the intake manifold off...