Advanced Stage 2 tuning file for Audi A3 1.8 TFSI CJS engine (2015, DSG), based on Siemens SIMOS18 ECU with software ID SC800H4100000. Includes decat (no post-cat lambda), raised rev limiter, and Pop&Bang functionality in Sport mode. Designed for performance setups with downpipe/exhaust modifications. Full binary file read via Alientech KTAG.