Wagner Tuning Mercedes-Benz G63 AMG Competition Radiator Kit
The Mercedes-Benz G63 AMG is a seriously capable machine, but its 4.0-litre V8 biturbo engine produces a great deal of heat, particularly under hard driving or when tuned beyond standard. This Wagner Tuning Competition Radiator Kit is designed to tackle that head-on, improving the efficiency of the charge air cooling circuit and helping the engine deliver consistent performance when you ask the most of it.
How It Works
The G63 AMG uses an indirect charge air cooling system. Instead of cooling the compressed air from the turbos with outside air directly, it runs a water-based coolant circuit to absorb the heat. The cooler this circuit stays, the cooler and denser the charge air becomes, which leads to better combustion and more reliable power delivery.
Wagner Tuning’s kit replaces the two standard auxiliary water coolers with upgraded units featuring their newly developed Competition racing core. This increases total radiator volume by 48% over the factory coolers. The internal and external cooling surfaces are carefully balanced to maximise heat transfer, without choking airflow to the main engine water radiator sitting alongside.
Built to Last
The coolers are finished with a thermally conductive anti-corrosion coating. This protects the aluminium core from long-term corrosion and keeps cooling efficiency consistent throughout the life of the part, not just when it is freshly fitted.
What’s Included
- 2x Wagner Tuning Competition auxiliary water coolers
- Silicone hoses
- Full installation hardware and fitting instructions
The kit is designed as a direct, plug-and-play replacement, using the original mounting points and connections. Detailed instructions are supplied, though a good level of mechanical knowledge is recommended given the complexity of the cooling system on these vehicles.
Vehicle Fitment
This kit is designed to fit the Mercedes-Benz G63 AMG W463, 430 kW / 585 PS, from June 2018 onwards.
Please use the vehicle lookup tool on this page or check the Vehicle Fitment tab to confirm compatibility with your specific model and build date before ordering.
For owners running a tuned or remapped G63 AMG, or anyone wanting to protect the engine during demanding use, this kit offers a meaningful and well-engineered upgrade over the standard cooling setup.
Additional Information
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