Stoptech rotors> calipers are direct bolt on. You need custom brake lines, and a set of brake pads.
I used:
Rotors: Stoptech Part # 126.33144SKT (includes left and right) These are slotted rotors
pads: Hawk HPS Part# HAW HB453F.585
Brake lines:
email
Chris@techna-fit.com and ask for the below. They were $50 + $9 shipping handling and he can do SS if you request. You can also use stock Macan lines but they're more expensive new and you have to ziptie them, so why? They can make them in SS.
Need 24" custom brake lines.
Hard line side 2016 Audi S3.
Needs the fitting to secure line to the knuckle.
Caliper side 2014 Audi S4.
^ I pulled that from the thread that talks about the retrofit - I had Techna-fit sleeve my lines in red, but if you want to just see the stainless line as-is, just ask for clear.
NOTE: Be sure to fully bleed your brakes after all the hardware is on, I had to do the whole process twice.
Bleeding order: Right rear, left rear, right front, left front.