How to replace the exhaust gasket on a 150cc GY6 Chinese scooter

Exhaust gasket and stud kit: https://www.partsforscooters.com/190-46-Premium-Exhaust-Gasket-Kit
Torque specs:
Exhaust studs 10 N-m (7.3 ft-lb, or 88.5 in-lb)
Muffler to engine bolts 20 N-m (14.6 ft-lb or 177 in-lb)
The exhaust pipe and muffler is mounted in front of the rear wheel, so you would also need to remove it if you're working on the tire or brake shoes. Laying the scooter down on it's side makes it easier to work on the exhaust, but you don't have to do it that way.