Just how much faster....

[V8Mustang]

Assuming good traction and good, consistent driving, gears (3.73s or 4.10s) will knock 3 to 5 tenths off your quarter mile times. Steeda underdrive pulleys will drop another 1 to 1.5 tenths. A good h, x or pro chamber mid pipe will knock another 1 - 2 tenths off. Long tube headers are the way to go for max power but you have to get a matching mid pipe, x, h, or pro chamber - decide if you want to go this route prior to buying your mid pipe.

A good mod to do while you are changing the pulleys is the Steeda timing adjuster (good for about one tenth reduction). Other good mods include a cold air kit or C&L mass air meter (both dyno proven to add 10-15 HP), a Steeda intake spacer and 70 mm throttle body.

With good suspension, great driving and traction (ie slicks) and all of the above mods (long tubes & 4.10s), hard top cars will run high 12s - low 13s. A vert will typically run 2-4 tenths slower due to the weight. And, before you bang on the car too hard, get an aftermarket shifter to help with your driving and to help protect your trans. Have fun with your new car!!!