What exactly you need for the job?Manual how to install timing chain kit on Audi S4 V8 BBK . - YouTube
Timing chain job on a 4.2 V8 Audi. This is the transmission side of the engine. I had to split transmission and engine before being able to reach the timing. : r/Justrolledintotheshop
Audi S4 3.0 TFSI CAJA / CAKA / CGW Timing chain replacement service – VAG Technic
Audi S4 4.2 V8 BBK / BAT Timing Chain Service – VAG Technic
Audi S4 V8 Timing Chain Repair - Matrix Integrated
Audi S4, S5 , SQ5 ,A6 3.0TFSI CAKA/ CAVA/ CGW Timing Chain Service | eBay
Audizine Forums
The timing chains on an Audi S4 engine : r/EngineeringPorn