Wagner Tuning Side Mount Radiator - BMW F8x M3/M4

Wagner Tuning Competition Side Mount Radiator

Optimise the cooling performance of your BMW F80/F82/F83 and ensure maximum performance under sustained hard driving. This Wagner Tuning Competition side water cooler is the targeted upgrade for thermal stabilisation of the 3.0-litre S55B30 turbo engine's indirect intercooler circuit — a massive 94% increase in volume over the OEM unit guarantees stable temperatures, ideal for race track and tuning applications.

Why this side water cooler is a must for your M3/M4:
- Extreme increase in volume: the competition racing core increases cooling volume by +94% (3.2 litres vs. OEM 1.65 litres)
- Direct performance increase: effectively lowers coolant temperature in the indirect intercooler circuit, stabilises system thermodynamics, and prevents heat-related power loss
- Optimal airflow: includes a carbon air duct that maximises airflow to the side cooler and further increases cooling performance
- Maximum heat transfer: the optimised ratio between internal and external cooling surfaces ensures maximum efficiency in heat exchange
- Long-lasting reliability: equipped with a heat-conducting, anti-corrosion coating for lasting cooling performance and system protection
- Plug & play installation: straightforward fitment with detailed installation instructions supplied

Technical detail — cooling circuit optimisation for the S55:
The 3.0-litre S55B30 turbo engine in the F80 M3/F82/F83 M4 relies on an indirect intercooler circuit — a separate cooling water circuit that determines how effectively charge air is cooled. The Wagner Tuning side water cooler significantly improves this circuit:
- Volume: increased to 3.2 litres (+94% vs. OEM 1.65 litres)
- Depth: increased from 40mm to 68mm
- Cooling surface: increased by 14.9%

This substantial increase in capacity, combined with the carbon air duct, keeps system temperature lower over a longer period — a critical advantage for reliability and performance under hard use.

Fitment: BMW F80 M3, F82 M4, F83 M4 (S55B30 engine)

Part number: 400001003.SM

Kit includes:
- 1x side water cooler (low-temperature circuit)
- 1x carbon air duct for the side water cooler
- 1x mounting material
- 1x installation instructions

Important Information: This product is intended for performance use and should be installed by a qualified professional. It is the customer's responsibility to ensure compatibility with their specific vehicle prior to purchase. If you are unsure, please contact us before ordering. Gridline Custom Motorsports is not responsible for issues arising from incorrect installation, misuse, or improper product selection. Due to the nature of performance parts, some items may be special order and subject to supplier availability and lead times.