First mod depends on what you want to do. There's two types of mods - performance and appearance. Appearance mods can be low cost if you swap out incandescent bulbs for LEDs, black out the chrome around the windows or paint the area between the tail pipes.
A low cost performance mod could be something like a after market intake. There's not a lot more you can do as a low cost performance mod.
A low cost performance mod could be something like a after market intake. There's not a lot more you can do as a low cost performance mod.