Optimize the cooling performance of your BMW G80/G81/G82 M3/M4 with our competition water cooler kit. The 3.0L R6 biturbo engine (S58) of the BMW M3/M4 models is equipped with an indirect charge air cooling circuit. The cooling process of the charge air is therefore not realized with ambient air as usual, but with a separate cooling water circuit. A reduction in the cooling water temperature leads directly to an improved cooling performance of the charge air. This is where the advantages of our Wagner Tuning Upgrade water cooler come into play. Our newly developed competition racing core increases the radiator volume of the standard water cooler by an impressive 60%. The ratio between the inner and outer cooling surface ensures maximum heat transfer and at the same time allows sufficient airflow for adjacent components such as the engine water cooler. The water coolers are also equipped with a thermally conductive anti-corrosion coating, which ensures a long-term cooling effect. Installation of the system is straightforward and plug & play thanks to our installation instructions. Prepare your BMW G80/G81/G82 M3/M4 for top performance and optimize its cooling system with our Competition Water Cooler Kit. The Wagner Tuning Competition Water Cooler Kit is plug and play suitable for the following models: BMW G87 M2 338k W/460 hp from 2023+BMW G80/81 M3 (Competition) 353-375KW/480-510PS from 2021+BMW G82 M4 (Competition/CSL) 353-405KW/480-550PS from 2021+Dimensions OEM water cooler: 505 mm x 605 mm x 30 mm V = 9.16 liters A = 3055 cm²Wagner Tuning water cooler dimensions: 505 mm x 605 mm x 48 mm V = 14.67 liters A = 3055 cm²part number 400001021 Weight: 9.00 kg Volume: 21.00 cm³/kg