I tested this on my old 410 stroker years ago (10.8:1 comp, small street roller, 5k converter, ported eddys, shifted at 6200 ish, 4.10 gear, 3200lbs). If I recall correctly, after I got the Victor dialed in (which took a little bit, messing with shooters and such) it netted me about 1 tenth (10.89-10.79 I believe). I will add that my Victor had MAJOR core shift. I had to spend a few hours with my grinder to get the ports to match up....but after that, I'm very pleased with the intake. I lost very little torque, and it pulls harder up top.
