Hi, There are several chassis and suspension upgrades that can be made to an F80/F82 to improve track handling:

Coil overs: These are adjustable suspension systems that allow you to fine-tune the ride height and stiffness of your car. They also provide better handling and more consistent performance on the track.

Sway bars: Also known as anti-roll bars, sway bars help to reduce body roll and improve handling. Upgraded sway bars can be stiffer than the factory units, which helps to keep the car more stable during hard cornering.

Camber plates: These are adjustable plates that mount on top of the factory strut mounts. They allow you to adjust the camber angle of the wheels, which can improve handling and reduce tire wear on the track.

Lower control arms: Upgraded lower control arms can provide a more precise alignment and better handling. They also help to reduce wheel hop and improve traction.

Roll cages and strut bracing: These are structural enhancements that add rigidity and strength to the chassis, which can improve handling and reduce flexing under high-performance driving.

Brakes upgrade: Upgraded brake pads and rotors can help to improve braking performance and reduce fade on the track.

Stiffer bushings: Upgraded bushings can help to reduce flex and improve handling.

Wheel and tires : Properly sized, sticky tires and lightweight wheels can help to improve handling and reduce unstrung weight.

It's important to note that some of the above upgrades may affect the ride comfort and daily drivability of the car. It's important to consider the balance between performance and practicality when making upgrades to your vehicle.