[nissanfreak317]

You can expect immediate results for the front fitment since, as previously stated, aftermarket fenders will replace the factory ones.

The rear is a different story, there is an involved process of cutting, welding, and sealing the factory metal on the rear quarter panels to allow you to take advantage of the extra room provided by aftermarket rear overfenders. There are threads involving this process done properly that you should look at, but be sure that you are capable before you start this almost irreversible and possibly damaging modification to your car.

Check out the wheel fitment whore thread to see what size wheels/offsets you will need to make this style look good. And also to see how great a car can look on stock metal fenders as well.

Good luck!