Posting this here for anyone who is looking to do this upgrade - it's an excellent, cost effective option. Video is on a TT Mk2 8J.
This will be a direct upgrade for the 8J as the TT's uprights are 15mm (which is thin compared to other model's allow hubs). Anything larger and you will need to change them (i.e. the Passat alloy hubs are 33mm thick).
Audi TT Mk2 Epic Big Brake Upgrade part 2 - 17z Brembo Caliper & Forza 2 piece floating rotor how to
List of brake pad options for both 17z and 18z (working document)
This will be a direct upgrade for the 8J as the TT's uprights are 15mm (which is thin compared to other model's allow hubs). Anything larger and you will need to change them (i.e. the Passat alloy hubs are 33mm thick).
Audi TT Mk2 Epic Big Brake Upgrade part 2 - 17z Brembo Caliper & Forza 2 piece floating rotor how to
List of brake pad options for both 17z and 18z (working document)