Re: Top speed?
A car is normally lowered and suspension stiffened in order to go faster. You should also have the best tires you can afford and don't exceed their speed rating. Stiffer and lower makes a car more stable, as do front fascia that incorporate air damns... Stopping the air from all going under the car help keep it from lifting at speed, as do the correct rear wing or spoiler.
Mostly, it takes horsepower to go fast, everything else is to make it safer...
07 Roush 427R, Brembo 14" rotor and four piston calipers
05 GT Mustang, FRPP, FR X pipe, Hurst short throw,
American Racing Torque Thrust 10X20 wheels,
Granettelli tower brace, custom painted flat black grafix, Yellow Optima