CTS Turbo C7 Audi A6/A7 3.0T and S6/S7 4.0T Heat Exchanger Upgrade

The CTS Turbo heat exchanger upgrade replaces the restrictive factory unit in C7 Audi A6, A7, S6 and S7 models, addressing a known thermal bottleneck in the supercharged 3.0T and twin-turbo 4.0T cooling systems. Engineered with increased core volume and improved fin density, this direct-fit exchanger extracts heat more effectively from the water-to-air intercooler circuit. The result is sustained charge air temperatures during consecutive hard runs, protecting performance and engine integrity. Essential for tuned vehicles or track-driven applications where heat soak compromises drivability and power delivery.