Unfortunately I am limited with the 3,73 gears but I have gone unofficially 163-164 mph @7600 rpm. Officially 158.7 at the Mojave magnum. I had actually hit top speed in 5th gear at around the mile mark and then for some foolish reason I decided to put it in 6th to see if I could go faster and the car fell flat on it's face. Like a fat girl jumped in the trunk and invited her friends. car actually slowed down and I trapped at 158.7. I run 285/40/19 Pilot Super Sports out back. So my effective gear ratio is around 3.60 or thereabouts.
2011 Mustang GT 5.0 N/A 522 rwhp, 378rwt, Boss Intake Manifold, Comp Stage Two Cams, Livernois Ported Heads, Kooks Headers and X pipe, Wiseco Forged Pistons, Manley Rods, Polished / Balanced Forged Crank, Boss Valve Springs, Boss Oil Cooler, Boss Oil Pan, Cortex/JRI SA Coilovers, Boss 302 Springs, Boss 302r steering rack, Boss 302s front lower control arms, Cortex Watts Link, Cortex Torque Arm, Cortex Adjustable Lower Control Arm, MM K Member,MM Caster Camber Plates, Torsen T2r Differential,