This thing drives hard, moves some air and spools crazy fast. I for sure need more fuel on top. In the 'Street' setting of my xrt, it's around 1300-1400us for tune, 45psi of boost and won't go past 1150 for egt's und a wot run. Doesn't bark what so ever in between shifts and sounds like a freakin Dyson when above 20psi. Hopefully i'll get it on the dyno just for hp comparison on the same H&S boxed tune that I did the 584 with the 66. That tune runs around 1700-1800us. From there, start tweaking the tune and seeing what I can push it to on stock fuel. :biggun: