I have 3:55 gears stock, I do alot of around town drinving and after putting on intake and tune I need a little more ummmph. What gears will give me that and I also dont want to kill my gas or have to much driving difference except I want it quicker.

 

If you want to feel a difference, I would at least get 4.10s. Going from 3.55s to 4.10s isnt a huge difference, to me anyway, but it will feel noticably quicker. Theres PLENTY of threads on 4.10s, its one of the more popular mods next to CAI/ tune.

 

Moved to the performance section.

 

Gears are a torque multiplier, by definition, so switching from 3.55's to 4.10's is about a 15% improvement in twist. Factory GT is rated at 320 lb ft torque, and with CAI & tune, you're likely around 340 lb ft torque, so the 4.10's would make your car feel like a 3.55 geared car with 390 lb ft torque.