The APR Stage 3 System for the 2022+ Volkswagen Golf R and Audi S3 is the ultimate evolution of the EA888 Gen 4 platform - combining Garrett PowerMax GT2563S turbocharger support, APR's Multi-Port Injection fueling, and APR's Stage 3 ECU/TCU calibration into one factory-ECU-controlled ecosystem. The integrated MPI system works alongside the factory direct injection system under full ECU control, delivering the fuel capacity needed for true Stage 3+ power without a standalone controller. Available in 350 WTQ and 400 WTQ configurations with support for 91, 93, 100, 104 octane, and E85, the system has been validated at 3.12 seconds 0-60 MPH, an 11.16-second quarter mile at 123 MPH in full street trim at 3,000 density altitude - with 10-second capability at sea level - and 9.55 seconds 60-130 MPH, all while retaining OEM-style cold starts, drivability, and factory safety strategies.