alright i have a k&n, off-road x, magnaflow mufflers,i want to put 3.73 gears in but everyone is saying 4.10 s i drive 35 miles 1 way to work,i have a work car i use but if i was going to drive this car everyday is it too much? also how does it make it shift?some say it throws shift points off? the car is a more show than go with the 3.08s in it now i cant stand it but i want a car i can drive everyday also,by the way the car is a 98 gt with 42,000 on it,and its an automatic,steve