If you want to lower your FK8, there are a few things that you can do. Primarily, you'll need to adjust the suspension and add some aftermarket parts.
The first thing you'll need to do is get your hands on a good set of coilovers. Coilovers will allow you to adjust the height of your car, as well as the stiffness of the suspension. This will be key in getting your FK8 low to the ground. You'll also want to add some camber plates and adjustable control arms. This will give you more adjustability when it comes time to align your car.
In addition to adjusting the suspension, you'll also need to add some aftermarket parts. A good place to start is with a set of lowering springs. These will help bring the car down even further. You may also want to consider adding a larger rear sway bar and some stiffer bushings. These changes will help keep the car from rolling around too much in corners.
Finally, don't forget about aesthetics! Adding a body kit or splitters can really make your FK8 stand out from the crowd. Just remember that these changes will likely increase aerodynamic drag, so be prepared for slightly higher fuel consumption rates.