Wagner Tuning Audi S6/S7 C7 4.0 BiTurbo Radiator Kit
The Audi S6 and S7 (C7) use a 4.0-litre V8 twin-turbocharged engine with an indirect charge air cooling system. Rather than cooling the charged air with airflow alone (like a traditional front-mount intercooler), Audi route it through a dedicated water circuit. That water is then cooled by a small radiator at the front of the car – and it is this radiator that becomes the weak link when the engine is worked hard.
Wagner Tuning’s Competition Radiator Kit replaces that standard water cooler with a purpose-built unit featuring a competition racing core. With 92% more core volume than the original, it removes far more heat from the coolant, keeping charge air temperatures lower and the intake air denser. The practical benefit is more consistent performance under sustained or repeated hard driving, where the standard setup is prone to heat soak and the resulting drop in power.
What makes this radiator different
Wagner have carefully balanced the internal and external cooling surface ratio within the core. This delivers strong heat exchange without choking airflow to nearby coolers and radiators – a common pitfall with poorly designed upgrades. The core is also finished with a thermally conductive anti-corrosion coating, which protects the unit over time and helps maintain cooling efficiency for the long term.
Installation is designed to be straightforward. The kit is a direct fit for compatible vehicles, with silicone hoses, mounting hardware and detailed instructions all included in the box. No fabrication or custom work is required.
What’s included
- 1x Wagner Tuning competition water cooler (charge air cooling circuit radiator)
- Silicone hoses
- Mounting hardware and fitting instructions
Vehicle fitment
This kit is designed for the Audi S6 and S7 (C7) with the 4.0 TFSI BiTurbo V8 engine, covering 2012-2018 models in the 309-331 kW (420-450 PS) power range. Please use the vehicle lookup tool on this page, or check the Vehicle Fitment tab, to confirm compatibility with your specific car.
Whether you are running a remapped S6 or S7, or simply want to address charge air heat soak under demanding driving, this is a well-engineered, direct replacement that delivers a genuine improvement in cooling performance.
Additional Information
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