Makes the 12:1 517 like a mega torque wedge below 4500 but pull more like a Hemi all the way to 6800+
I've had a couple sets of -1's over the years that flowed close to these up top, but they were not as torquey as far as roll on power as these. On a race that doesn't matter a bit but on a mid 3 geared 3700lb street driven car they were a real game changer in terms of broad torque and driving satisfaction
