Awesome gears! I personally had a shop professionally install these along with a set of 31 spline axles and a new differential, therefor I can't say how the install was, but the finished product is awesome. The gears really woke my car up (Stock was 2.73s). The car is nearly always in its power range, or "power band." I must say, if you have headers and a full exhaust with no cats, highway driving will be quite a joy, but personally I don't drive on the highway too much. Also, some people think that with such a tall rear end gear the gas mileage drops, but I didn't notice a difference around town, but the MPG on the highway did decrease.