There are an extensive number of modifications available; you can improve your car's engine, suspension, tires, brakes... you name it and you can probably mod it. (gamerstemple.com)
I grabbed this recipe off of allrecipes and made a good number of modifications based on what I had in my apartment. (fairyburger.com)
Even though the base car is still a regular Nissan GT - R, Nismo has done a mind - boggling number of modifications to the vehicle to help generate a tremendous amount of performance. (motorbeam.com)